(Q45854017)
Statements
1 reference
Lack of detection of human immunodeficiency virus in persistently seronegative homosexual men with high or medium risks for infection (English)
1 reference
Pan LZ
1 reference
Sheppard HW
1 reference
Winkelstein W
1 reference
Levy JA
1 reference
1 November 1991
1 reference
164
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5
1 reference
962-964
1 reference