1. Make asNeededBoolean and asNeededCodeableConcept separate elements, and change the names and cardinalities to be asNeeded (0..1) and asNeededFor (0..*), respectively, to follow the pattern in MedicationRequest.dosageInstruction.Dosage and DeviceRequest  2. Add this invariant:  "AsNeededFor can only be set if AsNeeded is empty or true"      3. Update definitions to reflect the changes in the elements a. Reason:  Short: Reason or indication for requesting the service Description: The reason or the indication for requesting the service (e.g., procedure, lab test) b. asNeeded       Short: Perform the service "as needed"       Long: Indicates that the service (e.g., procedure, lab test) should be performed when needed (Boolean option).  c. asNeededFor         Short: Specified criteria for the service        Long: Indicates specific criteria that need to be met to perform the service (e.g., lab results or symptoms)                   4. Provide example showing how to use asNeeded/AsNeededFor and Reason      1. An example showing asNeeded and asNeededFor being used with Reason             Reason: glucose monitoring               AsNeeded: true              AsNeededFor: series of elevated glucose levels   2. An example showing asNeeded with Reason without AsNeededFor            Reason: continuous glucose monitoring              AsNeeded: true             AsNeededFor: empty