METRO I STONE MANAGEMENT, LTD

EAST TEXAS II - ATHENS, LP

Lithotripsy Clinic/Center

SE COLORADO LITHOTRIPSY II, LP

Lithotripsy Clinic/Center

EAST TEXAS II - LONGVIEW, LP

Lithotripsy Clinic/Center

IRONWOOD II STONE MANAGEMENT, LP

Lithotripsy Clinic/Center

HOUSTON LITHOTRIPSY II, LP

Lithotripsy Clinic/Center

RIO GRANDE LITHOTRIPSY, LP

Lithotripsy Clinic/Center

MISSISSIPPI VALLEY I STONE MANAGEMENT, LP

Lithotripsy Clinic/Center

MIDLAND STONE MANAGEMENT, LP

Lithotripsy Clinic/Center

METRO HOUSTON LITHOTRIPSY II, LP

Lithotripsy Clinic/Center

WHITE RIVER LITHOTRIPSY, LLC

Lithotripsy Clinic/Center

US LITHOTRIPSY, LP

Lithotripsy Clinic/Center

DALLAS STONE MANAGEMENT, LP

Lithotripsy Clinic/Center

NORTH TEXAS STONE MANAGEMENT, LP

Lithotripsy Clinic/Center

NORTH CENTRAL MISSOURI III LITHOTRIPSY, LP

Lithotripsy Clinic/Center

VERRAZANO LITHOTRIPSY, LP

Lithotripsy Clinic/Center

WESTERN PLAINS II LITHOTRIPSY, LP

Lithotripsy Clinic/Center

SOUTH TEXAS LITHOTRIPSY, LP

Lithotripsy Clinic/Center

GATEWAY III LITHOTRIPSY, LLC

Lithotripsy Clinic/Center

METRO I STONE MANAGEMENT, LTD

Lithotripsy Clinic/Center