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

Year Number of Results
1971 1
1976 1
1982 1
1983 2
1990 1
1998 1
2000 1
2019 1
2022 0
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Page 1
[Environmental health: concepts and activities].
Ordóñez GA. Ordóñez GA. Rev Panam Salud Publica. 2000 Mar;7(3):137-47. doi: 10.1590/s1020-49892000000300001. Rev Panam Salud Publica. 2000. PMID: 10808746 Spanish.
Preventable factors in hospital admissions for asthma.
Ordoñez GA, Phelan PD, Olinsky A, Robertson CF. Ordoñez GA, et al. Arch Dis Child. 1998 Feb;78(2):143-7. doi: 10.1136/adc.78.2.143. Arch Dis Child. 1998. PMID: 9579156 Free PMC article.
[Clarification of "operations research"].
Ordóñez GA. Ordóñez GA. Bol Oficina Sanit Panam. 1990 Oct;109(4):416-9. Bol Oficina Sanit Panam. 1990. PMID: 2149638 Spanish. No abstract available.