This policy explains how Crook Medical Publishing approaches evidence, official sources, references and updates in its medical and professional education.
Evidence and source selection
For medical publications, we prioritise relevant clinical guidelines, regulatory information, peer-reviewed research and other credible medical sources. For South African practice-compliance publications, we prioritise current legislation, regulations, government publications and regulator guidance. The authority, date, relevance and limits of each source are considered.
Evidence versus experience
Published evidence, legal or regulatory requirements and author experience are not presented as interchangeable. Practical observations may help explain real-world care or practice management, but they are identified as experience and do not override current law, established evidence or appropriately qualified professional judgement.
Review dates and editions
Books state their edition and publication information. Website pages display a review date where appropriate.
- Before Your Next Injection is a first-edition 2026 publication, with an on-sale date of 1 September 2026.
- The Complete Occupational Health and Safety Compliance Handbook is a first-edition 2026 publication, with legal and regulatory currency reviewed through 2 September 2026.
When updates are considered
Material changes in safety information, regulatory status, legislation, clinical guidance or high-quality evidence may prompt a correction, website notice or revised edition. An update is not made solely because a new source appears; its authority, quality, relevance and effect on the existing explanation are assessed first.
Reporting new evidence or errors
Readers and clinicians may send relevant evidence, official updates, corrections or questions to course@dekuilenmedical.co.za. Please include enough detail to identify the publication and passage concerned.
Last reviewed: 2 September 2026.