HVAC technicians are required to undergo and complete a minimum of six months up to two years of training. Training programs must be taken from technical schools accredited by organizations like HVAC Excellence or (PAHRA) the Partnership for Air-Conditioning, Heating Refrigeration Accreditation.
ICD-9-CM Volume 2 Index entries containing back-references to 783.1: 1  Abnormal, abnormality, abnormalities - see also Anomaly weight gain 783.1 of pregnancy 646.1 with hypertension - see Toxemia, of pregnancy. 2  Excess, excessive, excessively weight 278.02 gain 783.1 of pregnancy 646.1. 3  Gain, weight (abnormal) (excessive) (see also Weight, gain) 783.1.
Usually, an unrecognized cancer will have other symptoms or abnormalities of laboratory tests, in addition to unexplained weight loss. Potential causes of unexplained weight loss include: Addison's disease (adrenal insufficiency) Cancer. Celiac disease. Changes in diet or appetite. Changes in sense of smell. Changes in sense of taste. COPD (chronic obstructive pulmonary disease) and other lung diseases.