Sibling rivalry?
Federman D, Federman A. Sibling rivalry? Postgraduate Medicine 1997, 102: 29-32. PMID: 9254388, DOI: 10.3810/pgm.1997.07.241.Peer-Reviewed Original ResearchAccidents, TrafficAttitude of Health PersonnelHumansInternship and ResidencyMaleMotorcyclesPhysiciansSibling RelationsUnited States