Joint not involved in Rheumatoid arthritis according to 1987 modified ARA criteria?

According to 1987 modified ARA criteria : - Arthritis of 3 or more joint areas: soft tissue swelling (arthritis) of 3 or more joint areas observed simultaneously by a physician. The 14 possible joint areas involved are, right or left: Proximal interphalangeal    Metacarpophalangeal      Metatarsophalangeal Wrist Knee  Elbow Ankle