The following chapters and the preface by Louis Gifford were published in:

Gifford L. S. (2002) (Ed). Topical Issues in Pain 4.  Placebo and nocebo. Pain management. Muscles and pain. Falmouth, CNS Press:

An Introduction to evolutionary reasoning: diets, discs, fevers and the placebo.

Gifford, L. S. (2002). An Introduction to evolutionary reasoning: –  Diet, discs, fevers and the placebo. Topical Issues in Pain 4.  Placebo and nocebo. Pain management. Muscles and pain. L. S. Gifford. Falmouth, CNS Press: 119-144.

Preface.

Gifford, L. S. (2002). Preface. Topical Issues in Pain 4.  Placebo and nocebo. Pain management. Muscles and pain. L. S. Gifford. Falmouth, CNS Press: vii-xi