%0 Journal Article %A M. R. Polliack %A N. Shavitt %A M. Schneider %T The prevalence of long-term illness in a family practice. %D 1973 %J The Journal of the Royal College of General Practitioners %P 770-775 %V 23 %N 136 %U https://bjgp.org/content/bjgp/23/136/770.full.pdf