"Connective tissue cells" . "IARC Group 2B carcinogens" . "Discovery and invention controversies" . "Lentiviruses" . "Cofactors" . "Peripheral membrane proteins" . "Human cells" . "Macrophages" . "Lymphatic system" . "1983 in biology" . "HIV/AIDS" . "Cell biology" . "Phagocytes" . "Immune system" . "Infectious diseases" . "Epidemiology" . "Causes of death" . "Sexually transmitted diseases and infections" . "Enzymes" .