Calculate MoCA clock drawing test total
calculate_mocaclock.RdSum of MOCACLOC, MOCACLON, and MOCACLOH, but applies valid_values_only() before
adding values. This removes any values not 0 or 1.
calculate_mocaclock.RdSum of MOCACLOC, MOCACLON, and MOCACLOH, but applies valid_values_only() before
adding values. This removes any values not 0 or 1.