Editorial: Novel Therapeutic Potential for Pituitary Adenylate Cyclase-Activating Polypeptide (PACAP), Vasoactive Intestinal Peptide (VIP) and Related Peptides in Cognition Deficits - Lucia Ciranna; Dora Reglodi; Billy K. Chow; David Vaudry (Frontiers in Cellular Neuroscience, 2021)