Religious upbringing and culture affects rates of homosexuality. Dr. Neil Whitehead is a research scientist and biochemist and is his wife Briar Whitehead is a writer. Dr. Whitehead coauthored a book with with his wife entitled My Genes Made Me Do it - a scientific look at sexual orientation which argues that there is no genetic determinism in regards to homosexuality (homosexuals are "not born that way") and that there is abundant documentation that individuals are able to leave homosexuality and become heterosexuals. In 1993, M. Baron wrote in BMJ (British Medical Journal) the following: