Here are a few downloads that might be useful. Please click on the links below:

• Clinica Chimica Acta 1996; 256: 135-149
• Annals of Clinical Biochemistry 2000; 37 : 666-673
• Annals of Clinical Biochemistry 2000; 37 : 795-796
• Nicotine and Tobacco Reasearch 2001; 3 : 119-122
• Annals of Clinical Biochemistry 2003; 40 : 674-679
• Annals of Clinical Biochemistry 2004; 41: 411-413