1. Barrows HS, Mitchell DL: An innovative course in undergraduate neuroscience. Experiment in problem-based learning with 'problem boxes'. Br J Med Educ 1975; 9: 223-230.
2. Neville AJ, Norman GR: PBL in the undergraduate MD Program at McMaster University: Three iterations in three decades. Acad Med 2007; 82: 370-374.
3. Dienstag JL: Evolution of the new pathway curriculum at Harvard Medical School. Perspect Biol Med 2011; 54: 36-54.
4. Lee RMKW, Kwan CY: The use of problem-based learning in medical education. J Med Educ 1997; 1: 149-157.