Did the hair grow back

Yes in more than half of the cases that could be evaluated. However, a few cases had only partial regrowth of hair.

Severe hair loss over more than half of the head or body was reported to have occurred in 16 of 37 cases that could be evaluated. Of the 16 reports of severe hair loss, eight persons recovered most or all of their hair, and four reported persistent baldness. Also, of those 37 cases, 18 reported mild to moderate hair loss with most of the hair still intact. Nine (or half of these) had complete recovery. One did not have a complete recovery, and the outcomes of eight cases were unknown.