TY - GEN AU - Simkin,P A TI - Habitual knuckle cracking and hand function SN - 0003-4967 PY - 1991///0122 KW - Finger Joint KW - physiology KW - Habits KW - Hand Injuries KW - etiology KW - Humans KW - Risk Factors N1 - Publication Type: Comment; Letter UR - https://doi.org/10.1136/ard.49.11.957-b ER -