Table 1. Characteristics of the study infants.

Sample ID	Gestational age (week)	Sex	Mode of delivery	Use of antibiotics & probiotics during the first 6 months of age	Use of antibiotics & probiotics during pregnancy	Maternal sensitization on skin prick tests	Paternal sensitization on skin prick tests	Family history of allergic diseases
CD 1	40.0	F	CD	No	No	No	Not done	No
CD 2	38.5	F	CD	No	No	Yes	No	No
CD 3	40.3	F	CD	No	No	No	Yes	Yes
VD 1	38.5	M	VD	No	No	No	Yes	No
VD 2	38.2	F	VD	No	No	Not done	Not done	No
VD 3	39.2	M	VD	No	No	No	No	No

CD, cesarean delivery; F, female; M, male; VD, vaginal delivery.