Corrigendum: Insulin- like Growth Factor-Binding Protein Action in Bone Tissue: A Key Role for Pregnancy- Associated Plasma Protein-A - Beattie, James; Al-Khafaji, Hasanain; Noer, Pernille R.; Alkharobi, Hanaa Esa; Alhodhodi, Aishah; Meade, Josephine; El-Gendy, Reem; Oxvig, Claus (Frontiers in Endocrinology, 2018)