<prompt> All of the following disorders are due to defective nucleotide excision repair, EXCEPTXeroderma pigmentosumCockayne syndromeTrichothiodystrophyHereditary nonpolyposis colon cancer  <response>: Disorders of nucleotide repair Defective nucleotide excision repair Xeroderma pigmentosum Cockayne syndrome Trichothiodystrophy Defective mismatch repair Hereditary nonpolyposis colorectal cancer HNPCC Defective non homologous end joining repair Severe combined immunodeficiency disease SCID 