Facial expressions (e.g., grimaces, winces, wrinkled forehead, furrowed brow, clenched teeth or jaw)
facial expressions (e.g., grimaces, winces, wrinkled forehead, furrowed brow, clenched teeth or jaw)
Facial expressions (e.g., grimaces, winces, wrinkled forehead, furrowed brow, clenched teeth or jaw)
facial expressions (e.g., grimaces, winces, wrinkled forehead, furrowed brow, clenched teeth or jaw)