Acknowledgements

I am grateful for the helpful suggestions and comments from many students and health professionals who have used this web-based resource since it was first posted in 1999. I want to acknowledge the inspiration I received from my late Ph.D. advisor, Dr. Paul Johnson, who taught me by his example to strive for excellence in both teaching and research. I am also grateful to the other physiology faculty at the University of Arizona in the early 1970s for their contagious love and enthusiasm for physiology. Special gratitude is reserved for my wife Karen, our four sons, and my parents, who encouraged me to pursue my life's dreams. Finally, I want to thank God for being the One who enables me.

Richard E. Klabunde, Ph.D.
January, 2023