Across Canada, the publicly insured method of diagnosing sensitivities is the patient interview, as an environmental history and possibly in conjunction with a patient journal. The interview covers many of the same areas as described in Hippocrates, "On Airs, Waters and Places."
Supported by the Arcangelo Rea Family Foundation, the Canadian Association of Physicians for the Environment (CAPE) put together The Children's Environmental Health Project. It's a good project, if you keep in mind that sensitivities are not new with a worsening environment. Environmentalists want to use people with sensitivities to describe how the environment is worsening, just as others want to use us to prove that prescription drugs are dangerous. The sub-concerns are valid, but our history, including legally-obligating clinical knowledge, and consequent right to protection from damaging acts of commission, are often eclipsed by the way sub-concerns are argued.
For people with long-known sensitivities, it can be lethal to be available as needs substantiation for "new" theories. Keeping that in mind, if you click on the following image you will see CAPE's sensible approach to diagnosis, with a special emphasis on chemicals, synthetic substances and pollution. Like other physicians, except pediatricians, CAPE ignores the gratuitous disabling and killing of children with sensitivities in health care settings, and the daily suicide of one Canadian adult or youth with undiagnosed CNS reactions. They also downplay the importance of natural toxins and incitants that have always been with us.
Oh yeah. And when they talk about "new" methods of managing kids with sensitivities, they leave out the part about Abu Bakr Mohammad Ibn Zakariya al-Razi.