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Placebo effect in double-blind clinical trials: a review of interactions with medications.
Kleijnen J, de Craen AJ, van Everdingen J, Krol L. Kleijnen J, et al. Among authors: de craen aj. Lancet. 1994 Nov 12;344(8933):1347-9. doi: 10.1016/s0140-6736(94)90699-8. Lancet. 1994. PMID: 7968033 Review. No abstract available.
Why use placebos in clinical trials? A narrative review of the methodological literature.
Vickers AJ, de Craen AJ. Vickers AJ, et al. Among authors: de craen aj. J Clin Epidemiol. 2000 Feb;53(2):157-61. doi: 10.1016/s0895-4356(99)00139-0. J Clin Epidemiol. 2000. PMID: 10729687 Review.
Is there a need to control the placebo in placebo controlled trials?
De Craen AJ, Tijssen JG, Kleijnen J. De Craen AJ, et al. Heart. 1997 Feb;77(2):95-6. doi: 10.1136/hrt.77.2.95. Heart. 1997. PMID: 9068385 Free PMC article. No abstract available.
Number-needed-to-treat and placebo-controlled trials.
de Craen AJ, Vickers AJ, Tijssen JG, Kleijnen J. de Craen AJ, et al. Lancet. 1998 Jan 31;351(9099):310. doi: 10.1016/S0140-6736(05)78341-0. Lancet. 1998. PMID: 9652609 No abstract available.
Helicobacter pylori eradication therapy in The Netherlands.
Houben MH, van de Beek D, Hensen EF, de Craen AJ, van 't Hoff BW, Tytgat GN. Houben MH, et al. Among authors: de craen aj. Scand J Gastroenterol Suppl. 1999;230:17-22. doi: 10.1080/003655299750025499. Scand J Gastroenterol Suppl. 1999. PMID: 10499457
Impact of experimentally-induced expectancy on the analgesic efficacy of tramadol in chronic pain patients: a 2 x 2 factorial, randomized, placebo-controlled, double-blind trial.
de Craen AJ, Lampe-Schoenmaeckers AJ, Kraal JW, Tijssen JG, Kleijnen J. de Craen AJ, et al. J Pain Symptom Manage. 2001 Mar;21(3):210-7. doi: 10.1016/s0885-3924(01)00265-2. J Pain Symptom Manage. 2001. PMID: 11239740 Clinical Trial.
Placebo effect in the acute treatment of migraine: subcutaneous placebos are better than oral placebos.
de Craen AJ, Tijssen JG, de Gans J, Kleijnen J. de Craen AJ, et al. Among authors: de gans j. J Neurol. 2000 Mar;247(3):183-8. doi: 10.1007/s004150050560. J Neurol. 2000. PMID: 10787112
Placebos and placebo effects in medicine: historical overview.
de Craen AJ, Kaptchuk TJ, Tijssen JG, Kleijnen J. de Craen AJ, et al. J R Soc Med. 1999 Oct;92(10):511-5. doi: 10.1177/014107689909201005. J R Soc Med. 1999. PMID: 10692902 Free PMC article. No abstract available.
Placebo effect in the treatment of duodenal ulcer.
de Craen AJ, Moerman DE, Heisterkamp SH, Tytgat GN, Tijssen JG, Kleijnen J. de Craen AJ, et al. Br J Clin Pharmacol. 1999 Dec;48(6):853-60. doi: 10.1046/j.1365-2125.1999.00094.x. Br J Clin Pharmacol. 1999. PMID: 10594490 Free PMC article.
Is placebo analgesia mediated by endogenous opioids? A systematic review.
ter Riet G, de Craen AJ, de Boer A, Kessels AG. ter Riet G, et al. Among authors: de craen aj, de boer a. Pain. 1998 Jun;76(3):273-5. doi: 10.1016/s0304-3959(98)00057-8. Pain. 1998. PMID: 9718245 Review.
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