Temporal trends in calls for suicide attempts to poison control centers in France during the COVID-19 pandemic: a nationwide study by Jollant, F, Blanc-Brisset, I, Cellier, M, Ambar Akkaoui, M, Tran, VC, Hamel, J-F, Piot, M-A, Nourredine, M, Nisse, P, Hawton, K, Descatha, A, Vodovar, D