Histopathological scoring of untreated pig skin and pig skin with QDPMMA MNP applied, at 3, 30 and 70 days after application; n = 3 MNPs per group, six slides per MNP. (Untreated skin, 3 days and 30 days had n = 3 biological replicates; 70 days had n = 4 biological replicates; six tissue samples per biological replicate, s.d.)
