Homocysteine mediated decrease in bone blood flow and remodeling: role of folic acid. - Tyagi N; Kandel M; Munjal C; Qipshidze N; Vacek JC; Pushpakumar SB; Metreveli N; Tyagi SC (Journal of orthopaedic research : official publication of the Orthopaedic Research Society, 2011)