title: Comment on two papers by Dr. J. Fareed.
authors.affiliation: National Institute for Biological Standards and Control, South Mimms, Potters Bar, Herts, UK.
authors.forename: E A
authors.initials: EA
authors.lastname: Johnson
mesh_terms: D015951:Factor Xa; D006495:Heparin, Low-Molecular-Weight / Q000592:standards*; D006801:Humans; D010314:Partial Thromboplastin Time; D015842:Serine Proteinase Inhibitors
chemical_list: D006495:Heparin, Low-Molecular-Weight; D015842:Serine Proteinase Inhibitors; D015951:Factor Xa