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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1978 3
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2006 10
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2009 1
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Page 1
A placebo-controlled study of the effects of ayahuasca, set and setting on mental health of participants in ayahuasca group retreats.
Uthaug MV, Mason NL, Toennes SW, Reckweg JT, de Sousa Fernandes Perna EB, Kuypers KPC, van Oorsouw K, Riba J, Ramaekers JG. Uthaug MV, et al. Among authors: kuypers kpc. Psychopharmacology (Berl). 2021 Jul;238(7):1899-1910. doi: 10.1007/s00213-021-05817-8. Epub 2021 Mar 10. Psychopharmacology (Berl). 2021. PMID: 33694031 Free PMC article. Clinical Trial.
Clinical Implications of Kratom (Mitragyna speciosa) Use: a Literature Review.
Prevete E, Kuypers KPC, Theunissen EL, Esposito G, Ramaekers JG, Pasquini M, Corazza O. Prevete E, et al. Among authors: kuypers kpc. Curr Addict Rep. 2023;10(2):317-334. doi: 10.1007/s40429-023-00478-3. Epub 2023 May 12. Curr Addict Rep. 2023. PMID: 37266188 Free PMC article. Review.
135 results