This report was prepared by Eastern Research Group, Inc. (ERG), an ATSDR contractor, as a general record of discussion for the expert panel meeting on Health Effects of Asbestos and Synthetic Vitreous Fibers: The Influence of Fiber Length. This report captures the main points of scheduled presentations, highlights discussions among the panelists, and documents the public comments provided at the meeting. This report does not contain a verbatim transcript of all issues discussed, and it does not embellish, interpret, or enlarge upon matters that were incomplete or unclear. ATSDR will use the information presented during the expert panel meeting to aid in developing scientifically sound public health evaluations for exposures to short fibers. Except as specifically noted, no statements in this report represent analyses by or positions of ATSDR or ERG.