Human Immunodeficiency Virus Type 1 T-Lymphotropic Strains Enter Macrophages via a CD4- and CXCR4-Mediated Pathway: Replication Is Restricted at a Postentry Level
The Picower Institute for Medical Research, Manhasset, New York 110301.; Institute of Virology, Slovak Academy of Sciences, Bratislava, Slovakia2.; and MGN Medical Research Laboratories, Setauket, New York 117333.