Clinical evaluation of the oral probiotic<i>Streptococcus salivarius</i>K12 in the prevention of recurrent pharyngitis and/or tonsillitis caused by<i>Streptococcus pyogenes</i>in adultsFrancesco Di Pierro, Christian Streitberger, Nadia Giardini et al.|Expert Opinion on Biological Therapy|2013Cited by 99