At that time, he was transferred to the Medical Intensive Care Unit.
 The patient is in critical condition. 
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(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ is) (PP (IN in) (NP (JJ critical) (NN condition)))) (. .)))
( ( At ( that time ) ) ( , ( he ( ( was ( transferred ( to ( the ( Medical ( Intensive ( Care Unit ) ) ) ) ) ) ) . ) ) ) )
( ( The patient ) ( ( is ( in ( critical condition ) ) ) . ) )