Variation of Age in Clinically Overt Mitral Stenosis Patients from Two Different Countries: A Cross-National Study [printed text] / Limbu, Y. R., Author; Dali, B., Author; Khatry-Chhetry, M. B., Author; Maskey, A., Author; Pun, W. M., Author; Huijun Zhu, Author in Nepal Journal of Science and Technology Volume 2, Number 1 (2000)