Methods Epidemiologic investigation. Results Rangtang county is a cold and high sea level area.
结果壤塘县地形复杂，海拔高，气候寒冷。
Objective To investigate natural condition, prevalent status, production and living manners of the KBD area in Rangtang county.
目的考察当地自然状况，病情现状和生产生活方式等，制订大骨节病防制策略。
Objective To investigate natural condition, prevalent status, production and living manners of the KBD area in Rangtang county.
目的考察当地自然状况，病情现状和生产生活方式等，制订大骨节病防制策略。
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