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Grüber C, Keil T, Kulig M, Roll S, Wahn U, Wahn V; MAS-90 Study Group.Grüber C, et al. Among authors: roll s.Pediatr Allergy Immunol. 2008 Sep;19(6):505-12. doi: 10.1111/j.1399-3038.2007.00688.x. Epub 2007 Dec 21.Pediatr Allergy Immunol. 2008.PMID: 18167154
Keil T, Lau S, Roll S, Grüber C, Nickel R, Niggemann B, Wahn U, Willich SN, Kulig M.Keil T, et al. Among authors: roll s.Allergy. 2009 Mar;64(3):445-51. doi: 10.1111/j.1398-9995.2008.01867.x. Epub 2009 Jan 17.Allergy. 2009.PMID: 19170671
Berghöfer A, Roll S, Bauer M, Willich SN, Pfennig A.Berghöfer A, et al. Among authors: roll s.Community Ment Health J. 2014 Oct;50(7):753-8. doi: 10.1007/s10597-014-9700-4. Epub 2014 Jan 22.Community Ment Health J. 2014.PMID: 24449430