Surveillance of respiratory pathogens and influenza-like illnesses in general practices - The Netherlands, winter 1997-98.
The Netherlands Institute of Primary Health Care (NIVEL) has coordinated the activities of a sentinel surveillance network of 43 general practices since 1970. These practices care for 1% of the Dutch population, a sample representative of the national pop
Heijnen
M.L.A.
ML
Dorigo-Zetsma
J.W.
JW
Bartelds
A.I.M.
AI
Wilbrink
B
B
Sprenger
M.J.W
MJ