Dihedral groups are Camina groups for degree odd or at most four

Statement
Suppose $$n$$ is a natural number. The fact about::dihedral group $$D_{2n}$$ of degree $$n$$ and order $$2n$$ is a fact about::Camina group if and only if $$n$$ is odd or $$n = 2$$ or $$n = 4$$.