Consulta y Subconsulta

[Martin2006]

INtento esto pero no me da nada

Código MySQL:

SELECT * 
from consulta 
where (fechacons BETWEEN TIMESTAMP('2013-02-01') AND TIMESTAMP('2013-04-26')) 
AND obrasocial IN (SELECT DISTINCT obrasocial, count( obrasocial )  FROM consulta WHERE obrasocial>2 GROUP BY obrasocial)