determining a nonlinear static function ƒp representing the sensitivity of the patient to {HEAD ~ a dosage} of {TAIL ~ the anesthesia drug} at steady state; and 
determining a nonlinear static function ƒp representing the sensitivity of the patient to { HEAD ~ a dosage } of { TAIL ~ the anesthesia drug } at steady state ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH