Flat feet (also called pes planus or fallen arches) is a postural deformity in which the arches of the foot collapse, with the entire sole of the foot coming into complete or near-complete contact with the ground. Sometimes children are born with flat feet (congenital). There is a functional relationship between the structure of the arch of the foot and the biomechanics of the lower leg. The arch provides an elastic, springy connection between the forefoot and the hind foot so that a majority of the forces incurred during weight bearing on the foot can be dissipated before the force reaches the long bones of the leg and thigh.In pes planus, the head of the talus bone is displaced medially and distal from the navicular bone. As a result, the Plantar calcaneonavicular ligament (spring ligament) and the tendon of the tibialis posterior muscle are stretched to the extent that the individual with pes planus loses the function of the medial longitudinal arch (MLA). If the MLA is absent or nonfunctional in both the seated and standing positions, the individual has "rigid" flatfoot. If the MLA is present and functional while the individual is sitting or standing up on their toes, but this arch disappears when assuming a foot-flat stance, the individual has "supple" flatfoot. This latter condition is often treated with arch supports. However, a recent randomized controlled trial found no evidence for the efficacy of treatment of flat feet in children either from expensive prescribed orthotics (i.e., shoe inserts) or less expensive over-the-counter orthotics.
Italian Journal of Psychopathology, 17 (3): 265–276.http://www.gipsicopatol.it/issues/2011/vol17-3/02Spiti.pdf
Agoraphobia Without a History or Panic Disorder May Be Part of the Panic Disorder Syndrome. Journal of Nervous & Mental Disease, 190(9):624-630, September 2002. The Relationship of Agoraphobia and Panic in a Community Sample of Adolescents and Young Adults. External links

Anxiety Disorders Association of America Information for families, clinicians & researchers
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Agoraphobia without history of panic disorder at Curlie
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