A lens barrel has a cam tube having a cam groove formed on an inner circumferential side thereof. The reference health care service provider is characterized and the given health care service provider are characterized respectively by a first and second rate of occurrence of the certain outcome. Space efficiency provided by the electric steering and an electrically driven tool deck facilitate a variety of tool mounting configurations including a rear discharge deck with a chute passing under the vehicle frame between the driven wheels. The method further comprises identifying at least one pixel value for the current picture by referring to the value of at least one pixel in an allowed pixel position of the previously decoded picture. An indication of approval andor disapproval may be received from each of the approvers andor reviewers.