Correction: Harnessing nanotechnology for stem-cell therapies: revolutionizing neurodegenerative disorder treatments – a state-of-the-art update - Neevashini Chengebroyen; Anmol Seelan; Kamal Yoonus Thajudeen; Saad Ali Alshehri; Aritra Biswas; Israrahmed Adur; Vino Sundararajan; Sajitha Lulu Sudhakaran; Harpreet Singh (Frontiers in Pharmacology)