Key term: variation

Letter to the editor 1981;7(4):311-312   pdf
Sources of variation in fluorometry of zinc protoporphyrin in blood.
Granjean P, Lintrup J
 
Original article 2001;27(6):373-380   pdf
A novel approach for evaluating level, frequency and duration of lumbar posture simultaneously during work
Jansen JP, Burdorf A, Steyerberg E