None of the genetic polymorphisms investigated were associated with length of hospitalisation or with stay in NICU The frequencies of COLEC11 C/T or T/T genotypes, A/G heterozygosity and MBL deficiency-associated genotypes were 47/136 (34.6%), 12/136 (8.8%) and 20/171 (11.7%) when preterms were hospitalised for more than 2 weeks and 77/270 (28.5%, p=0.25), 22/271 (8.1%, p=0.85) and 38/351 (10.8%, p=0.77), when their stay in hospital was shorter (Table 2). Here, COLEC11 is linked to mannose-binding lectin deficiency.