tokens: Urinary sodium excretion reached signficantly lower values in sgk1 ( + / + ) mice ( 15 + / - 5 mumol / mg crea ) than in sgk1 ( - / - ) mice ( 35 + / - 5 mumol / mg crea ) and was associated with a significantly higher body weight gain in sgk1 ( + / + ) compared with sgk1 ( - / - ) mice ( + 6 . 6 + / - 0 . 7 vs . + 4 . 1 + / - 0 . 8 g ) .