[1] Belfast City Hosp, Dept Bacteriol, No Ireland Publ Hlth Lab, Belfast BT9 7AD, Antrim, North Ireland
[2] Royal Belfast Hosp Sick Children, No Ireland Paediat Cyst Fibrosis Ctr, Belfast, Antrim, North Ireland
[3] Belfast City Hosp, No Ireland Reg Adult Cyst Fibrosis Ctr, Belfast, Antrim, North Ireland
[4] Univ Ulster, Sch Biol & Life Sci, Coleraine BT52 1SA, Londonderry, North Ireland
[5] Royal Grp Hosp, Dept Microbiol, Belfast, Antrim, North Ireland
[6] Adelaide & Meath Hosp, Dept Microbiol, Dublin, Ireland
[7] Univ Dublin Trinity Coll, Dept Microbiol, Dublin 2, Ireland