Adaptation of the WHO guideline for residual DNA in parenteral vaccines produced on continuous cell lines to a limit for oral vaccines. - Lebron JA; Troilol PJ; Pacchione S; Griffiths TG; Harper LB; Mixson LA; Jackson BE; Michna L; Barnum AB; Denisova L; Johnson CN; Maurer KL; et al. (Developments in biologicals, 2006)