External
In the case of Reservists and cadets, the initial medical treatment for the claimed condition is likely to have been undertaken by a private or public medical prac — titioner. In these cases, the date of occurrence for a disease should be the date that the disease was diagnosed by a qualified medical practitioner, unless some other earlier date can be positively established on the facts. For example, the treating medi — c — al practitioner may certify that earlier undiagnosed symptoms (headaches, dizzy spells) were an early indication of the claimed condition.