a follow-up study ( in 6.4 years ) of a group of men aged 40-49 years ( an average of 46.9 ) and engaged in strenuous mental work detected a large number of coronary heart disease ( chd ) patients ( 28.9 % ) which exceeds the chd incidence in the corresponding age groups of population threefold .
C0018799
the chd
C0018787
chd