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Blood alcohol levels.
Chambers N, Pearce K, Perez-Avila CA. Chambers N, et al. Among authors: perez avila ca. Arch Emerg Med. 1987 Jun;4(2):127. doi: 10.1136/emj.4.2.127-a. Arch Emerg Med. 1987. PMID: 3620054 Free PMC article. No abstract available.
Using a metal detector to locate a swallowed ring pull.
Ryan J, Perez-Avila CA, Cherukuri A, Tidey B. Ryan J, et al. Among authors: perez avila ca. J Accid Emerg Med. 1995 Mar;12(1):64-5. doi: 10.1136/emj.12.1.64. J Accid Emerg Med. 1995. PMID: 7640836 Free PMC article.