RT Journal Article SR Electronic T1 Introducing LTASR, a new R package based on the NIOSH Life Table Analysis System JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP oemed-2022-108462 DO 10.1136/oemed-2022-108462 A1 Stephen J Bertke A1 Kaitlin Kelly-Reif YR 2022 UL http://oem.bmj.com/content/early/2022/09/19/oemed-2022-108462.abstract AB