MTHFR and acute lymphoblastic leukemia: 19 te Winkel te Winkel ML ML de Muinck Keizer-Schrama de Muinck Keizer-Schrama SM SM de Jonge de Jonge R R van Beek van Beek RD RD van der Sluis van der Sluis IM IM Hop Hop WC WC Germline variation in the MTHFR and MTRR genes determines the nadir of bone density in pediatric acute lymphoblastic leukemia: a prospective study Germline variation in the MTHFR and MTRR genes determines the nadir of bone density in pediatric acute lymphoblastic leukemia: a prospective study Bone Bone 2011 2011 48 48 571 571 577 577 20955826 20955826