Ectodermal Dysplasia/prevention & control; Skin Diseases/genetics; Animals; Cats; Cattle; Chromosome Aberrations/epidemiology; Chromosome Disorders; Dermatology/trends; Disease Models, Animal; Dogs; Ectodermal Dysplasia/epidemiology; Hair Diseases/genetics; Hair Diseases/prevention & control; Horses; Humans; Ichthyosis/prevention & control; Ichthyosis/therapy; Infant, Newborn; Mice; Neurofibromatosis 1/epidemiology; Neurofibromatosis 1/genetics; Prenatal Diagnosis; Research Design; Sheep; Skin Diseases/congenital; Skin Diseases/epidemiology; Skin Neoplasms/epidemiology; Skin Neoplasms/genetics; Swine; United States