than 60 observational hours. (B) Each center shall carry out three sessions per calendar year, from four to six months in duration with minimal overlap. (C) A majority of the observational hours shall be spent observing a practicing physician. The other observational hours shall be spent in a manner that ensures a robust, well rounded experience that exposes the students to a variety of aspects of medical care and health care administration. (2) Consideration of areas with staffing shortages In carrying out paragraph (1)(C), the Secretary may consider providing clinical observation sessions with physicians employed in occupations with large staffing shortages, such as occupations relating to women’s health and psychiatric care and occupations identified under section 7412 of title 38, United States Code. (f) Students (1) Selection The Secretary shall select to participate in the pilot program under subsection (a) undergraduate students who are— (A) citizens of the United States