sentence: Different from the Endoporter system and lipofectamine whose applications are confined to the laboratory context , viral vectors have a track record of clinical use ( Hacein ‐ Bey ‐ Abina et al ., 2008 ; Kohn , Sadelain , & Glorioso , 2003 ; McCormack & Rabbitts , 2004 ) and hence may enable the therapy to be more readily transitioned into future clinical practice .