Chinese Journal of Osteoporosis Yang, D., Cheng, J. and An, Z. (1999). . The principles and methods to establish the diagnosis criteria of primary osteoporosis. Chinese Journal of Osteoporosis. 1999; 5:36-40. 1999 https://researcherprofiles.org/profile/1333691 Yang, D., Cheng, J. and An, Z. (1999).