By: Sarah Kliff Around 1 am on August 20, Ismael Saifan woke up with a terrible pain in his lower back, likely the result of moving furniture earlier that day. "It was a very sharp muscle pain," Saifan, a 39-year-old engineer, remembers. "I couldn't move or sleep in any position. I was trying laying down, sitting down, nothing worked." Saifan went online to figure out where he could see a do...