Full text
PDF![342](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/a9d3c6d583d6/jcgprac00009-0052.png)
![343](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/6eb42f7e0fc8/jcgprac00009-0053.png)
![344](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/366780321921/jcgprac00009-0054.png)
![345](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/20e5943ee21f/jcgprac00009-0055.png)
![346](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/d091f8b6b121/jcgprac00009-0056.png)
![347](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/969584a33f1f/jcgprac00009-0057.png)
![348](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/f10491278bf6/jcgprac00009-0058.png)
![349](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/61b8b89d466c/jcgprac00009-0059.png)
![350](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/588efd8c43c0/jcgprac00009-0060.png)
![351](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/b46de8902c1f/jcgprac00009-0061.png)
![352](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/bff8aaf03efc/jcgprac00009-0062.png)
![353](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/a9805a0c7573/jcgprac00009-0063.png)
![354](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/c546539e6f7c/jcgprac00009-0064.png)
![355](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/831410414376/jcgprac00009-0065.png)
![356](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/93455b8cf543/jcgprac00009-0066.png)
![357](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/24ffa9226d4d/jcgprac00009-0067.png)
![358](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d5ae/1878303/72d8a1999ce8/jcgprac00009-0068.png)
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- ATKINS H. J. The three pillars of clinical research. Br Med J. 1958 Dec 27;2(5112):1547–1553. doi: 10.1136/bmj.2.5112.1547. [DOI] [PMC free article] [PubMed] [Google Scholar]
- HOPKINS P. Referrals in general practice. Br Med J. 1956 Oct 13;2(4997):873–877. doi: 10.1136/bmj.2.4997.873. [DOI] [PMC free article] [PubMed] [Google Scholar]
- THOMPSON D. J., CIOCCO A. Sickness, change of residence, and death. I. General results of follow-up in two population groups. Br J Prev Soc Med. 1958 Oct;12(4):172–182. doi: 10.1136/jech.12.4.172. [DOI] [PMC free article] [PubMed] [Google Scholar]