Authors: K J Mertz; R L Ransom; M E St Louis; S L Groseclose; A Hadgu; W C Levine; C Hayman Journal: Am J Public Health Date: 2001-08 Impact factor: 9.308
Authors: J J Xu; M K Smith; J Chu; G W Ding; D F Chang; G B Sharp; H Z Qian; L Lu; A M Bi; N Wang Journal: Int J STD AIDS Date: 2012-09 Impact factor: 1.359