RT Journal Article SR Electronic T1 If you could just provide me with a sample: examining sampling in qualitative and quantitative research papers JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 68 OP 70 DO 10.1136/ebn.2.3.68 VO 2 IS 3 A1 Carl Thompson YR 1999 UL http://ebn.bmj.com/content/2/3/68.abstract AB