Dr. John MendelsohnPhoto by Shelby HodgeM.D. Anderson Cancer Center's Albert B. and Margaret M. Alkek Hospital beforethe upper floors were added.M.D. Anderson has more than 17,000 employees.Staying No. 1 M.D. Anderson's Dr. John Mendelsohn & the future of treating cancer Shelby HodgeJul 6, 2010 | 10:41 am