21.   Doctors have long noticed that almost all schizophrenics are heavy smokers.

22.   Doctors have long noticed that women with bad teeth seem more likely to give birth prematurely.

23.   Doctors have noticed that men with cancer often have lower levels of free PSA than do those whose elevated PSA has other causes.

24.   Doctors noticed reduced facial wrinkling, and the toxin became popular in plastic surgery.

25.   Nur el-Din worked at the hospital until August when doctors noticed a spate of mysterious deaths during her shifts.

26.   At the Souza Aguiar hospital, where he was taken immediately by a fellow traveler, doctors noticed that Kawaguti had a skull fracture and two blood clots.