493 . J Biomech Eng. 1981 Feb;103(1):24-6. doi: 10.1115/1.3138240. J Biomech Eng. 1981. PMID: 7253609 . Delahoy MJ, et al. MMWR Morb Mortal Wkly Rep. 2021 Sep 10;70(36):1255-1260. doi: 10.15585/mmwr.mm7036e2. MMWR Morb Mortal Wkly Rep. 2021. PMID: 34499627 .
![top](data:image/svg+xml,%3Csvg%20xmlns="http://www.w3.org/2000/svg"%20width="16"%20height="16"%3E%3Crect%20fill-opacity="0"/%3E%3C/svg%3E "top")
