Problem
Review the following paper, and explain using at least one example in the paper the concept of 'Endophenotypes'. Provide examples of each component of an endophenotype, and explain how they are linked into a single instance of an endophenotype.
To clarify further: by "each component" I mean starting at something like 'gene' and ending at something like 'behavioral phenotype'. By "single instance" I mean, if you have an endophenotype you are using as an example, then 'each component' should be from that example, and not examples of one component taken from one endophenotype, and examples of another component taken from another (although, if it is impossible to do that, an answer explaining why is the right way to go).