Postdoctoral Fellowships of Human Frontier Science Program HFSP are available for scientists who wish to work in foreign laboratories, with emphasis on individuals early in their careers who wish to obtain training in a different field of research. Fellows who return to their home countries are eligible to apply for a Career Development Award. Cross-disciplinary fellowships are intended for postdoctoral fellows with a Ph.D. degree in the physical sciences, chemistry, mathematics, engineering and computer sciences who wish to receive training in biology Registration not required.