Figure S1. Funnel plot of studies included in the Any breast feeding and wheezing illness analysis.

Figure S2. Funnel plot of studies included in the Exclusive breast feeding for >3 or 4 months and wheezing illness analysis .

Appendix S1. Search: 8 July 2010 in MEDLINE Ovidsp.

Appendix S2. Excluded studies and reasons for exclusion.

Appendix S3. Analysis of when and how exclusive breast feeding was defined.

PPE_1233_sm_AppendixS1-S3.doc101KSupporting info item
PPE_1233_sm_Figure_S1.pdf14KSupporting info item
PPE_1233_sm_Figure_S2.pdf15KSupporting info item

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