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Consequently, it is not clear the direction that the bias will take. There are other assets that we have explicitly decided not to use as instruments. We will avoid using assets related to the quality of the diet like the ownership of fridge or blenders. We will not use the ownership of fans as an instrument as this could be correlated with weather conditions that might influence the prevalence of infectious diseases. We do not use either the ownership of TV or Radio as it can be correlated to the access of health related information (Thomas, et al. 1991). We. | I State of Washington Office of Superintendent of Public Instruction Department of Health Infectious Disease Control Guide for School Staff Dr. Terry Bergeson State Superintendent of Public Instruction April 2004 Office of Superintendent of Public Instruction Old Capitol Building P.O. Box 47200 Olympia WA 98504-7200 For more information about the contents of this document please contact Gayle Thronson OSPI E-mail gthronson@ospi.wednet.edu Phone 360.725 6040 To order more copies of this document please call 1-888-59-LEARN I-888-595-3276 or visit our Web site at http www.k12.wa.us publications Please refer to the document number below for quicker service 04-0014 This document is available online at http www.k12.wa.us This material is available in alternative format upon request. Contact the Resource Center at 888 595-3276 TtY 360 664-3631. Infectious Disease Control Guide for School Staff Dr. Terry Bergeson State Superintendent of Public Instruction Marty S. Daybell Deputy Superintendent Administration and Operations Chief Information Officer Marcia L. Riggers Assistant Superintendent Student Support and Operations Martin Mueller Director Learning and Teaching Support Gayle Thronson Health Services Program Supervisor Learning and Teaching Support Revised April .