You are on £16 000. If you answer the next question correctly you will take home at least £32 000. The question is: “what is your health locus of control?” Is it (a) your GP's surgery, (b) a newly discovered brain stem centre which increases its neuronal firing rate when you are ill, (c) your beliefs about who or what is most important in keeping you well, or (d) the National Institute for Clinical Excellence (NICE). Not sure? …