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The father and aunt of Bobbi Kristina Brown, the daughter of late singer Whitney Houston who was hospitalized in January after being found unresponsive in her bathtub, have been named her co-guardians, attorneys for the parties said.

"Both (Bobby) Brown and (Pat) Houston are jointly responsible for decisions related to (Bobbi Kristina Brown's) care and medical needs," attorneys for Brown and Houston, Christopher Brown and David Long-Daniels respectively, said in a joint statement.

Lawyer Bedelia Hargrove was appointed as Bobbi Kristina Brown's conservator, responsible for her "assets, including her likeness, rights and legal claims", the statement said.

The majority of the estate comprises the assets left to Brown by her mother. Houston died in 2012, leaving her reported $20 million estate to her only daughter, E! reported.

Bobbi Kristina Brown, 22, was discovered on Jan. 31 face down and unresponsive in a bathtub in her suburban Atlanta home. Few details about her condition have been released since. In March, she was transferred from Emory University Hospital in Atlanta to a rehabilitation center, according to her family.

Bobbi Kristina Brown attends the opening night of "The Houstons: On Our Own" in New York, in this file photo taken October 22, 2012.ANDREW KELLY / Reuters file