@article {pmid8774204,
	title = {Aging and heparin-related bleeding},
	journal = {Arch. Intern. Med.},
	volume = {156},
	number = {8},
	year = {1996},
	month = {Apr},
	pages = {857{\textendash}860},
	author = {Campbell, N. R. and Hull, R. D. and Brant, R. and Hogan, D. B. and Pineo, G. F. and Raskob, G. E.}
}
