Sarep­ta CEO Doug In­gram is step­ping down from his post, the com­pa­ny said, end­ing a brash tenure in which he brought sev­er­al Duchenne mus­cu­lar dy­s­tro­phy prod­ucts to mar­ket and lat­er presided over a spi­ral­ing share price amid in­tense safe­ty and reg­u­la­to­ry ques­tions...