RT Journal Article SR Electronic T1 A 66-year-old woman with spontaneous rib fracture JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 988 OP 989 DO 10.1503/cmaj.141435 VO 187 IS 13 A1 Susan R. Harris YR 2015 UL http://www.cmaj.ca/content/187/13/988.abstract