@article {726, editor = {,}, title = {Twenty years on}, volume = {22}, number = {124}, pages = {726--727}, year = {1972}, publisher = {Royal College of General Practitioners}, issn = {0035-8797}, URL = {https://bjgp.org/content/22/124/726}, eprint = {https://bjgp.org/content/22/124/726.full.pdf}, journal = {British Journal of General Practice} }