[[Mood]], psychological factors, focus, and interest in the issue can all complicate the data. For example Psychogenic pain<ref>https://en.wikipedia.org/wiki/Psychogenic_pain</ref>. | [[Mood]], psychological factors, focus, and interest in the issue can all complicate the data. For example Psychogenic pain<ref>https://en.wikipedia.org/wiki/Psychogenic_pain</ref>. |