An open label, balanced, randomized, two treatments, two sequences, two periods, crossover, single dose, bioequivalence study of lafigin dt (lamotrigine) 200 mg orally dispersible tablets of laboratorios recalcine s.a. Chile and lamictal odt® (lamotrigine) 200 mg orally dispersible tablets of glaxosmithkline llc, in healthy, adult, human subjects under fasting condition