Wafaa M El-Sadr1, Katherine Harripersaud2, Ronald Bayer3. 1. Wafaa M. El-Sadr is the director of ICAP at Columbia University and a professor at the Mailman School of Public Health, Columbia University, New York, NY. wme1@columbia.edu. 2. Katherine Harripersaud is a staf member of ICAP at Columbia University, New York, NY. 3. Ronald Bayer is a professor at the Mailman School of Public Health, Columbia University, New York, NY.