| Guide to bone health and disease in cystic fibrosis RM Aris, PA Merkel, LK Bachrach, DS Borowitz, MP Boyle, SL Elkin, ... The Journal of Clinical Endocrinology & Metabolism 90 (3), 1888-1896, 2005 | 553 | 2005 |
| The impact of dietary protein on calcium absorption and kinetic measures of bone turnover in women JE Kerstetter, KO O’Brien, DM Caseria, DE Wall, KL Insogna The journal of clinical endocrinology & metabolism 90 (1), 26-31, 2005 | 383 | 2005 |
| Dietary protein, calcium metabolism, and skeletal homeostasis revisited JE Kerstetter, KO O'Brien, KL Insogna The American journal of clinical nutrition 78 (3), 584S-592S, 2003 | 340 | 2003 |
| Low protein intake: the impact on calcium and bone homeostasis in humans JE Kerstetter, KO O'Brien, KL Insogna The Journal of nutrition 133 (3), 855S-861S, 2003 | 319 | 2003 |
| Bone markers, calcium metabolism, and calcium kinetics during extended‐duration space flight on the Mir space station SM Smith, ME Wastney, KO O'Brien, BV Morukov, IM Larina, SA Abrams, ... Journal of Bone and Mineral Research 20 (2), 208-218, 2005 | 317 | 2005 |
| Hypovitaminosis D among healthy children in the United States: a review of the current evidence AJ Rovner, KO O’Brien Archives of pediatrics & adolescent medicine 162 (6), 513-519, 2008 | 282 | 2008 |
| Dietary protein affects intestinal calcium absorption JE Kerstetter, KO O’Brien, KL Insogna The American journal of clinical nutrition 68 (4), 859-865, 1998 | 274 | 1998 |
| Pregnancy and iron homeostasis: an update C Cao, KO O'brien Nutrition reviews 71 (1), 35-51, 2013 | 272 | 2013 |
| Estrogen suppression in males: metabolic effects N Mauras, KO O’Brien, KO Klein, V Hayes The Journal of Clinical Endocrinology & Metabolism 85 (7), 2370-2377, 2000 | 270 | 2000 |
| Prenatal iron supplements impair zinc absorption in pregnant Peruvian women KO O'Brien, N Zavaleta, LE Caulfield, J Wen, SA Abrams The Journal of nutrition 130 (9), 2251-2255, 2000 | 221 | 2000 |
| Hemoglobin concentrations influence birth outcomes in pregnant African-American adolescents SC Chang, KO O'Brien, FR Witter, MS Nathanson, J Mancini The Journal of nutrition 133 (7), 2348-2355, 2003 | 191 | 2003 |
| Maternal iron status influences iron transfer to the fetus during the third trimester of pregnancy KO O’Brien, N Zavaleta, SA Abrams, LE Caulfield The American journal of clinical nutrition 77 (4), 924-930, 2003 | 179 | 2003 |
| Insulin-like growth factor I and growth hormone (GH) treatment in GH-deficient humans: differential effects on protein, glucose, lipid, and calcium metabolism N Mauras, KO O’Brien, S Welch, A Rini, K Helgeson, NE Vieira, ... The Journal of Clinical Endocrinology & Metabolism 85 (4), 1686-1694, 2000 | 159 | 2000 |
| Serum hepcidin is significantly associated with iron absorption from food and supplemental sources in healthy young women MF Young, RP Glahn, M Ariza-Nieto, J Inglis, G Olbina, M Westerman, ... The American journal of clinical nutrition 89 (2), 533-538, 2009 | 155 | 2009 |
| Differences in calcium absorption and kinetics between black and white girls aged 5–16 years SA Abrams, KO O'Brien, LK Liang, JE Stuff Journal of Bone and Mineral Research 10 (5), 829-833, 2020 | 149 | 2020 |
| Influence of prenatal iron and zinc supplements on supplemental iron absorption, red blood cell iron incorporation, and iron status in pregnant Peruvian women KO O'Brien, N Zavaleta, LE Caulfield, DX Yang, SA Abrams The American journal of clinical nutrition 69 (3), 509-515, 1999 | 148 | 1999 |
| Characteristics and risk factors for adverse birth outcomes in pregnant black adolescents SC Chang, KO O'Brien, MS Nathanson, J Mancini, FR Witter The Journal of Pediatrics 143 (2), 250-257, 2003 | 144 | 2003 |
| Calcium and magnesium balance in 9-14-y-old children SA Abrams, MA Grusak, J Stuff, KO O’Brien The American journal of clinical nutrition 66 (5), 1172-1177, 1997 | 138 | 1997 |
| Maternal vitamin D status and calcium intake interact to affect fetal skeletal growth in utero in pregnant adolescents BE Young, TJ McNanley, EM Cooper, AW McIntyre, F Witter, ZL Harris, ... The American journal of clinical nutrition 95 (5), 1103-1112, 2012 | 118 | 2012 |
| Calcium absorption is significantly higher in adolescents during pregnancy than in the early postpartum period KO O'Brien, MS Nathanson, J Mancini, FR Witter The American journal of clinical nutrition 78 (6), 1188-1193, 2003 | 117 | 2003 |
