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Note the inclusion of a link which leads to the Patient Dashboard, letting the user to view the Patient instance easily.
Below : Screenshot of a Complex Obs created using a concept of type 'Location'. 
Below : Creating complex Obs without using fieldGen handlers. A simple text box is displayed instead of the auto complete 
Below : Obs validation in action 
Below : Complex Obs validation gets tricky if youre not using fieldGen handlers for domain object types 
Please note that both complex concepts and complex obs can be voided, edited and un voided.