[Risk management of violence: a core professional activity of every psychiatrist].

Background: Risk management is an entrustable professional activity in the Dutch curriculum for psychiatrists in training. However, many psychiatrists feel they lack the training and experience needed to conduct an adequate risk assessment of violence.

Aim: Theoretical reflection on methods and practical techniques to adequately assess violence in patients with severe mental disorders.

Decline of IgG pertussis toxin measured in umbilical cord blood, and neonatal and early infant serum.

Maternal pertussis-specific antibodies are passively acquired by infants during pregnancy. An IgG pertussis toxin (IgG-PT) concentration of >20 U/ml is considered to protect neonates against pertussis. To evaluate the IgG concentration at birth and during the first two months of life, we examined the IgG-PT concentration in the umbilical cord blood and three times during the neonatal and early infant period.