Check out the link below for an interesting article on the relationship between relationship anxiety and lowered immunity, i.e. increasing vulnerability to illness. It is a reminder of the importance of self-differentiation and self-regulation in the context of our most important relationships.
http://www.sciencedaily.com/releases/2013/02/130211110847.htm?goback=%2Egde_1050447_member_213419600
Resilience 