Dec. 4, 2017 – KAMPALA, Uganda — Pain is only the latest woe in John Bizimungu’s life … Now, at 75 and on crutches, he sits at home hoping customers will drop by. But at least the searing pain from the cancer that has twisted his right foot is under contro … Mr. Bizimungu’s morphine is an opioid, closely related to the painkillers now killing 60,000 Americans a year…