SOCIAL AND NUTRITIONAL PARAMETERS OF ACUTE DIARRHOEABOLLAG U.1980; ARCH. DIS. CHILD.; ISSN 0003-9888; GBR; DA. 1980; VOL. 55; NO 9; PP. 711-714; BIBL. 9 REF.Article

STUDIES INTO THE INCIDENCE OF CARRIERS OF ENTEROPATHOGENIC E. COLI.BOLLAG U.1978; TRANS. R. SOC. TROP. MED. HYG.; GBR; DA. 1978; VOL. 72; NO 6; PP. 588-591; BIBL. 2 P.Article

The association of weight-for-height with clinical and haematological indices in the assessment of the nutritionally at risk schoolchildBOLLAG, U.Courrier - Centre international de l'enfance. 1984, Vol 34, Num 2-3, pp 140-144, issn 0538-5482Article

Asthmaanfälle in der Praxis: epidemiologische Merkmale und saisonale Muster in der Longitudinalbeobachtung = Asthma attacks in sentinel practices: epidemiological characteristics and seasonal patternsBOLLAG, U.Das Gesundheitswesen (Stuttgart. Thieme). 1993, Vol 55, pp 42-45, issn 0941-3790, SUP1Conference Paper

Evolution de l'asthme en Suisse : Le réseau suisse de surveillance sentinelle, 1988-1996 = Asthma trends in Switzerland : the Swiss Sentinel Surveillance Network, 1988-1996BOLLAG, U; CLOETTA, J; OBERREICH, J et al.Euro surveillance. 1999, Vol 4, Num 2, pp 21-24, issn 1025-496XArticle