A first in human clinical trial assessing the safety and immunogenicity of transcutaneously delivered enterotoxigenic Escherichia coli fimbrial tip adhesin with heat-labile enterotoxin with mutation R192G. - Riddle MS; Maciel M Jr; Porter CK; Poole ST; Gutierrez RL; Gormley R; Laird RM; Sebeny PJ; Dori KE; Greenleaf ME; Hoq F; Turiansky GW; et al. (Vaccine, 2020)