Black, N; Hutchings, A; (2002) Reduction in the use of surgery for glue ear: did national guidelines have an impact? Quality & safety in health care, 11 (2). pp. 121-4. ISSN 1475-3898 DOI: https://doi.org/10.1136/qhc.11.2.121 Full text not available from this repository.

Rovers, MM; Black, N; Browning, GG; Maw, R; Zielhuis, GA; Haggard, MP; (2005) Grommets in otitis media with effusion: an individual patient data meta-analysis. Archives of disease in childhood, 90 (5). pp. 480-485. ISSN 0003-9888 DOI: https://doi.org/10.1136/adc.2004.059444 Full text not available from this repository.

Black, N; Hutchings, A; (2002) Effectiveness of guidelines on persistent glue ear in children - Authors' estimates of size of impact are probably excessive. BMJ, 324 (7338). p. 673. ISSN 1468-5833 DOI: https://doi.org/10.1136/bmj.324.7338.673