Question: who noticed that the edges of their chairs were wearing out in an unusual way

title: Meyer Friedman
text: Then , there was the furniture . In the waiting room of the practice the two doctors ran , the chairs badly needed reupholstering . What was unusual was that the chairs were worn down on the front edges of the seats and armrests instead of on the back areas , which would have been more typical . The doctors later observed that those chairs were chosen by coronary patients , who tended to sit on the edge of the seat and leaped up frequently , usually to ask how much longer they would have to wait for their appointments to begin . They were as tense as racehorses at the gate . And they had heart problems . Was there a link ? After some initial observations , the doctors hypothesized that there was a connection . Friedman began some studies . In one , he observed 40 accountants , to see if their cholesterol levels rose under the stress of tax season . `` In March , their cholesterol shot up , '' said Dr. Gerald W. Friedland , a Stanford University professor emeritus of radiology who collaborated with Friedman on `` Medicine 's 10 Greatest Discoveries , '' a 1998 book . 

Answer: answer: The two doctors Meyer Friedman and Gerald W. Friedland, a Stanford University professor emeritus of radiology who collaborated with Friedman on "Medicine's 10 Greatest Discoveries,'' a 1998 book, observed those chairs in the waiting room of their practice; the chairs were worn down on the front edges of the seats and armrests instead of on the back areas.
answer: The two doctors: Meyer Friedman and Gerald W. Friedland observed that the chairs were worn down on the front edges of the seats and armrests instead of on the back areas and that these chairs were chosen by coronary patients, who tended to sit on the edge of the seat.