The Board has determined that the veteran's low back disability is service-connected, as it became symptomatic during his active military service and was not clearly and unmistakably present prior to service.

The Board denied the claims for service connection for chronic fatigue syndrome, a low back disability, a left knee disability, and a left shoulder disability as there was no evidence to support that these conditions were incurred in or caused by the Veteran's military service.

The Board denied service connection for sinusitis, bronchitis, liver abscess, abdominal aorta, left and right hamstring disabilities. The Board granted an increased disability rating of 40 percent for right upper extremity radiculopathy but denied all other claims.

The Board denied an initial rating higher than 70 percent for PTSD and remanded several service connection claims, including dyspnea, chronic fatigue syndrome, fibromyalgia, irritable bowel syndrome, obstructive sleep apnea, low back disability, and right lower extremity radiculopathy of the sciatic nerve.

The appeal for an initial compensable rating for GERD was withdrawn, and the claims for service connection for a low back disability, bilateral ankle disability, bilateral knee disability, and right knee disability were denied.