The effect of the 7R allele at the DRD4 locus on risk tolerance is independent of background risk in Senegalese fishermen oleh Gwen-Jirō Clochard, Aby Mbengue, Clément Mettling, Birane Diouf, Charlotte Faurie, Omar Sene, Emilie Chancerel, Erwan Guichoux, Guillaume Hollard, Michel Raymond, Marc Willinger