Bangladesh-Korea Friendship Hospital is a governmental primary healthcare center in Savar at the outskirts of Dhaka. It was built by the Korea International Cooperation Agency (KOICA) in 1998 and donated to the Bangladesh government. Since then, KOICA has dispatched physicians specialized in internal medicine every 2 years. The hospital is a 2-story building equipped with 30 beds with specialists of internal medicine, general surgery, obstetrics/gynecology, and orthopedic surgery. After local adaptation training, I worked in the hospital from July 2011 to November 2013. The average number of patients referred to me during this period was 206.4 per month and 17.7 per day. I reviewed medical records of patients with communicable diseases (CDs) and NCDs diagnosed in August 2011 - August 2012 to analyze the dynamics of the diseases. Records of out-patient lists, recorded by previous Korean doctors on mission in 1999, were also reviewed.

Between 1999 and 2012, proportion of patients with NCDs referred to Korean volunteer doctors increased from 75% to 83%, whereas that of patients with CDs decreased from 25% to 17% (Table 1). In Bangladesh, NCDs are the main causes of mortality (3). NCDs account for 59% of all deaths in Bangladesh (4). In terms of disability-adjusted life years (DALYs), NCDs, including injuries, account for 61% of the total disease burden (5). The underlying causes are modifiable risk factors that are common for all countries (6): tobacco use, inadequate consumption of fruits and vegetables, and physical inactivity. The following rates of risk factors are recorded in Bangladesh: tobacco use in rural males - 52%, urban males - 41%, in rural females - 29%, urban females - 17%; fruits and vegetables consumption among adults - 3.2 and 1.7 per day, respectively; physical inactivity among adults - 35% in males and 64% in females (7).

Easy access to the hospital improved detection and referral rates of diabetes mellitus in Bangladesh-Korea Friendship Hospital. However, the lacks of diagnostic and therapeutic facilities, such as cardiac catheterization lab, are possibly responsible for the delayed diagnosis and inadequate treatment of cardiovascular disease.

Nearly 90% of Bangladeshis use solid fuel. Many patients suffer from chronic respiratory disease, which is caused by indoor air pollution due to burning of solid fuel and high tobacco use. There are many patients complaining of chronic myalgia and arthralgia; most of them are blue collar workers in the garment factories near the hospital.

Tuberculosis is the only CD which has increased significantly over the last decade. Bangladesh-Korea Friendship Hospital is one of the two governmental medical centers in Savar upazila, providing free anti-tuberculosis treatment under the Directly Observed Treatment Short-course (DOTS) program. Many patients who cannot afford the cost of the treatment are referred to that hospital.

Medical missions of high-income countries offering services to LMICs are intensifying globally (2). Simple surgical interventions and distribution of medicines for acute infectious disease are the main services, which are offered during the short missions. Some experts have raised concerns about unintended consequences of such short volunteer services (891011121314). One of the issues is that patients with chronic NCDs often require sustainable and systematic interventions over a long period.

Although diagnostic and curative standards of NCDs are common worldwide, patients in LMICs are deprived of effective services due to socioeconomic and cultural factors (15). Chronic care of NCDs requires a clear understanding of the patients' values and their active involvement in the management. Foreign doctors are encountering numerous difficulties in the interaction with local patients and healthcare specialists. Unavailability of essential chronic care services hinders the overall management of NCDs (16). The lack of medical equipment, shortage of healthcare providers and weak referral system are among the factors lowering the efficiency of healthcare services.

Paucity of medical records and follow-up data negatively affect continuity of chronic care services. Preventive measures as essential components for controlling chronic diseases (17) are too often neglected. Education level of local patients is inadequate to realize consequences of poor lifestyle. Local health practitioners are also unaware of the importance of lifestyle modifications, and hospitals rarely employ screening tools. Many medical missions pay more attention to treating illnesses rather than preventing them, which is due to the lack of interest and intention to deliver preventative programs.

Inadequate financing is among the main barriers to proper healthcare services in LMICs. Costly repeated consultations for chronic conditions are unaffordable for poor households. Lack of finances is an impediment for regularly purchasing medicines, healthy nutritious food, and covering expenses for transportation.

Foreign doctors on medical mission confront language barriers, leading to poor communication throughout the management of chronic conditions. Many volunteers have little knowledge of the depth of poverty and are unaware of the limits of local medical facilities and healthcare system. Social and cultural factors and contradictions between indigenous and allopathic explanations of ill health question the efficacy of medical services rendered by foreign doctors.

To be successful in tackling NCDs, long-term medical missions should prioritize preventive measures. I presented several options for modeling sustainable medical missions (18). Identifying and managing modifiable risk factors are initial key steps toward effective volunteer services. Professionals skilled in addressing community healthcare needs should be recruited to serve in the most vulnerable areas. It is also important to form a team with members from diverse specialist backgrounds capable of working with local community healthcare personnel. Such team should deliver cost-effective, affordable, and feasible services (19). Provision of medicines and technologies should be effectively organized alongside with intensive logistical planning, financial support, training personnel, and institutional support for practitioners. Properly handled individual medical records and arrangements for referrals are important components of long-term care for NCDs. Finally, volunteer specialists should receive extensive pre-departure training with courses of local language and cross-cultural communication.

Without proper preparation and collaboration, medical missions can be seen as self-serving (providing value for only foreign visitors without meeting the local community's needs), ineffective (providing temporary, short-term therapies that fail to address the root causes) and inappropriate (failing to follow current standards of healthcare delivery or public programs) (20). To succeed in a medical mission for LMICs, organizers of the work have to focus more on preventive strategies for NCDs and recruit skilled and experienced professionals capable of supporting local community health personnel.