广西防治艾滋病规模化现场流行病学和干预研究2012ZX10004910;广西自然科学基金2013GXNSFAA019225;广西医疗卫生重点科研课题2012052;a grant from the National Scientific Major Research Projects of the “Twelfth Five-Year Plan” of China Guangxi2012ZX10004910;the Natural Science Foundation of Guangxi2013GXNSFAA019225;the Key Research Projects of Guangxi Medical and Health2012052