1. Marks, V., Lindup, W.E. and Bayliss, E.M. (1973): Measurements of therapeutic agents in blood. Adv. Clin. Chem.,76, 47–109.
2. Alexanderson, B., Price-Evans, D.A. and Sjöqvist, F. (1969): Steady—state plasma levels of nortriptyline in twins: influence of genetic factors and drug therapy. Brit. Med. J.,4, 764–768.
3. Braithwaite, R.A. and Flanagan, R.J. (1975): Steady —state plasma nortriptyline concentrations in epileptic patients. Brit. J. Clin. Pharmacol.,2, 469470.
4. Aherne, G.W., Mould, G.P., Piall, E. and White, W.F. (1977): Prolonged and increased methotrexate concentrations using probenecid in man. Brit. Med. J., (In press).
5. Trevor, A., Rowland, M. and Way, EX. (1971): Techniques for studying drug decompositionin vivo, in Fundamentals of drug metabolism and drug disposition, eds. La Du, B.N., Mandel, H.G. and Way, EX., 369–399, Williams & Wilkins, Baltimore.