title: Expression of Concern: Human amniotic epithelial cells can differentiate into granulosa cells and restore folliculogenesis in a mouse model of chemotherapy-induced premature ovarian failure.
authors.affiliation: Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, 15219, PA, USA. rst13@pitt.edu.
authors.forename: Rocky S
authors.initials: RS
authors.lastname: Tuan
authors.affiliation: REMEDI, CURAM, National University of Ireland Galway, Galway, Ireland. timothy.obrien@nuigalway.ie.
authors.forename: Timothy
authors.initials: T
authors.lastname: O'Brien