1. Department of Microbiology and Medical Zoology, NeuroAIDS Program, UPR, MSC, SNRP; University of Puerto Rico, Medical Sciences Campus; San Juan PR 00936-5067
2. Departments of Physical Medicine and Division of Neurology, NeuroAIDS Program, UPR, MSC, SNRP; University of Puerto Rico, Medical Sciences Campus; San Juan PR 00936-5067