“…The age factors again relate to phases of major activity of such secretory glands at puberty and adolescence, menopause' and sometimes old age. Such activity may, however, be affected by other considerations such as climate, occupation, and systemic disease, including febrile, endocrine, and central nervous disorders.Some would, as I think correctly, regard the diathesis as affecting the whole patient and not merely the skin, but chief attention will be paid here to the skin, though general considerations cannot be entirely excluded (Ingram, 1957).
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