Walton, K., Dorne, J. L., and Renwick, A. G. (2004) Species-specific uncertainty factors for compounds eliminated principally by renal excretion in humans. Food Chem Toxicol. 42(2), 261-74.

Wang, D.Q. (2002)  Aging per se is an independent risk factor for cholesterol gallstone formation in gallstone susceptible mice. J Lipid Res 43, 1950-9.

Wang, H., Zhao, Y., Bradbury, J.A., Graves, J.P., Foley, J., Blaisdell, J.A., Goldstein, J.A. and Zeldin, D.C. (2004)  Cloning, expression, and characterization of three new mouse cytochrome p450 enzymes and partial characterization of their fatty acid oxidation activities. Mol Pharmacol 65, 1148-58.

Wang, L., Hu, C.P., Deng, P.Y., Shen, S.S., Zhu, H.Q., Ding, J.S., Tan, G.S. and Li, Y.J. (2005)  The protective effects of rutaecarpine on gastric mucosa injury in rats.  Planta Med  71, 416-9.

Washizu T., Ikenaga H., Washizu M., Ishida T., Tomoda I., Kaneko J.J. (1990). Bile acid composition of dog and cat gall-bladder bile. Japanese Journal of Veterinarian Science, 5: 423-425.

Washizu T., Tomoda I., Kaneko J.J. (1991). Serum bile acid composition of the dog, cow, horse and human. Journal of Veterinarian Medicine Science, 53: 81-86.

Watkins, P.B. (1997). The barrier function of CYP3A4 and P-glycoprotein in the small bowel. Advanced Drug Delivery Reviews, 26:161-170.

Waziers, de I., Cugnenc, P.H., Yang, C.S., Leroux J.-P., Beaune, P.H. (1990). Cytochrome P450 isoenzymes, epoxide hydrolase and glutathione transferases in rat and human hepatic and extrahepatic tissues. Journal of Pharmacology and Experimental Therapeutics, 253:387-394.

Weber, M.P., Stambouli, F., Martin, L.J., Dumon, H.J., Biourge, V.C. and Nguyen, P.G. (2002)  Influence of age and body size on gastrointestinal transit time of radiopaque markers in healthy dogs. Am J Vet Res 63, 677-82.

Weibel, E.R. (1999)  Gas exchange: large surface and thin barrier determine pulmonary diffusing capacity.  Minerva Anestesiol  65, 377-82.

Weis C.P., LaVelle J.M. (1991). Characteristics to consider when choosing an animal model for the study of lead bioavailability. Chemical Speciation and Bioavailability, 3 (3/4) : 113- 119.

Weisburger J.H., Grantham P.H., Vanhorn E. (1964). Activation and detoxification of N-2-fluorenylacetamide in man. Cancer Research, 24: 475-477.

Widdowson, E.M. (1985)  Development of the digestive system: comparative animal studies.  Am J Clin Nutr  41, 384-90.

Wildgrube H.J., Stockhausen H., Petri J., Fussel U., Lauer H. (1986). Naturally occurring conjugated bile acids, measured by high-performance liquid chromatography, in human, dog and rabbit bile. Journal of Chromatography, 353: 207-213.

Williams R.T. (1972). Interspecies variations in the metabolism of xenobiotics. Biochemical Society Transactions, 2: 359-377.

Willis, L. R.; Evan, A. P.; Connors, B. A.; Fineberg, N. S., and Lingeman, J. E. Effects of SWL on glomerular filtration rate and renal plasma flow in uninephrectomized minipigs. J Endourol. 1997; 11(1):27-32.

Wilson C.G., Washington N. (1989). Physiological pharmaceutics. Biological barriers to drug absorption, Ellis Horwood Limited, Chisester.

Wiseman, T.G., Mahan, D.C., Peters, J.C., Fastinger, N.D., Ching, S. and Kim, Y.Y. (2007)  Tissue weights and body composition of two genetic lines of barrows and gilts from twenty to one hundred twenty-five kilograms of body weight.  J Anim Sci  85, 1825-35.

Woodmansey, E. J., McMurdo, M. E. T., Macfarlane, G. T., and and Macfarlane, S. (2004) Comparison of Compositions and Metabolic Activities of Fecal Microbiotas in Young Adults and in Antibiotic-Treated and Non-Antibiotic-Treated Eldery Subjects.  Applied and Environmental Microbiology, 70: 6113-6122.