Add Yahoo as a preferred source to see more of our stories on Google. EDITOR’S NOTE: Watch “Dr. Sanjay Gupta Reports: Animal Pharm” on Sunday, May 18 at 8 p.m. ET/PT on CNN. Tim Andrews knew that he ...

(CNN) — Tim Andrews knew that he needed dialysis to manage his end-stage kidney disease, but over months of treatment, he started to wonder whether it was worth it. He was exhausted and hopeless. He ...

(CNN) — Tim Andrews knew that he needed dialysis to manage his end-stage kidney disease, but over months of treatment, he started to wonder whether it was worth it. He was exhausted and hopeless. He ...