[1] Fertil Associates Memphis, Memphis, TN 38120 USA
[2] Duke Univ, Sch Med, Dept Med, Durham, NC 27706 USA
[3] Johns Hopkins Univ, Sch Med, Dept Gynecol & Obstet, Div Reprod Endocrinol & Infertil, Baltimore, MD 21205 USA
[4] LabCorp, Ctr Preimplantat Genet, Rockville, MD USA