RT Journal T1 HIp protectors and hip fracture—reply JF JAMA JO JAMA YR 2007 FD November 14 VO 298 IS 18 SP 2135 OP 2139 DO 10.1001/jama.298.18.2139-b UL http://dx.doi.org/10.1001/jama.298.18.2139-b AB