<qa>  What is the name of the HIV cohort?Human Immunodeficiency Virus HIV infected patients who meet the entry criteria for the maraviroc pivotal trials Maraviroc versus Optimized Therapy in Viremic Antiretroviral Treatment-Experienced Patients, MOTIVATE will be identified from the EuroSIDA HIV cohort. The rates of specific clinical adverse events in this identified patient population will be compared with the rates of these events in the participants of the MOTIVATE trials. 