Erratum to "Protein supplement consumption is linked to time spent exercising and high-protein content foods: A multicentric observational study" [Heliyon 5 (4) (April 2019) e01508]. Issue 5 (May 2019) - Thomas, Ewan; Karsten, Bettina; Sahin, Fatma Nese; Ertetik, Goktug; Martines, Francesco; Leonardi, Vincenza; Paoli, Antonio; Gentil, Paulo; Palma, Antonio; Bianco, Antonino