RT Journal Article SR Electronic T1 Controversies: Examining the increase in “re-dos” JF International Society of Hair Restoration Surgery FD Publication of the International Society of Hair Restoration Surgery SP 166 OP 167 DO 10.33589/21.5.0166 VO 21 IS 5 A1 Knudsen, Russell A1 Farjo, Nilofer A1 Bernstein, Robert M. A1 Pathomvanich, Damkerng YR 2011 UL http://www.ISHRS-HTForum.org/content/21/5/166.abstract AB We all have a (hopefully) small number of patients with “unsatisfactory” results. If we think it is poor graft growth, then it has in the past been described as either X factor (unknown cause) or H factor (something we humans did in the procedure). Nilofer Farjo poses the question as to whether the number of patients needing/requesting free “top-ups,” here described as “re-dos,” has increased due to H factor or due to inaccurate expectations.