Sexual dimorphism of acoustic signals in the oriental white stork: non-invasive identification of sex in birds. Identification of the sex of birds is important for captive breeding of endangered species. In the oriental white stork (Ciconia boyciana), an endangered s... Hiroko,Eda-Fujiwara,Ai,....
cities, 1,369 men who have sex with men (MSM) were asked about sexual self-identification, recent HIV risk behavior... - 《Aids & Behavior》 被引量: 101发表: 1998年 Risk Factors Associated with HIV Infection among Male Prostitutes. Objectives. This study documents the human immunodeficiency ...