 Emergency medicine also includes many aspects of acute primary care, and shares with family medicine the uniqueness of seeing all patients regardless of age, gender or organ system .The emergency physician workforce also includes many competent physicians who trained in other specialties.Physicians specializing in emergency medicine can enter fellowships to receive credentials in subspecialties such as palliative care, critical-care medicine, medical toxicology, wilderness medicine, pediatric emergency medicine, sports medicine, disaster medicine, tactical medicine, ultrasound, pain medicine, pre-hospital emergency medicine, or undersea and hyperbaric medicine.