950158 ExR exceptional responders 2 950159 ExR excess red 2 950154 ExR excess red vegetation index 2 950152 ExR expansion revealing 2 950149 ExR extracellular region 2 950153 ExR excellent responses 1 950151 ExR Excessive red 1 950155 ExR exfoliative rejection 1 950156 ExR expansion-repression mechanism 1 950157 ExR experienced radiologists 1 950147 ExR expression ratio 1 950148 ExR external rotation 1 950150 ExR maneuver-external rotation 1