1. Introduction.- 2. Methods.- 3. History of human challenge studies.- 4. ethical issues.- 5. Community engagement, ethics review, and regulation.- 6. Case studies.- 7. Conclusions.- Acknowledgements.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.