1. When is an elder old? Effect of preexisting conditions on mortality in geriatric trauma;Grossman;J Trauma,2002
2. Selective management of flail chest and pulmonary contusion;Richardson;Ann Surg,1982
3. The morbidity and mortality of rib fractures;Ziegler;JTrauma,1994
4. Rib fractures in major trauma;Cameron;Aust N Z J Surg,1996
5. Three or more rib fractures as an indicator for transfer to a Level I trauma center;Lee;A population-based study,1990