"2 hours duration" is correct and is commonly used in written English.
For example, you could say, "The event will last for 2 hours duration."
The patterns of behaviour described above were observed during 82.5% of the dates where movement records of greater than 2 hours duration were obtained.
End of dose was defined as "deterioration and recurrence of parkinsonian symptoms as a result of shorter (sometimes only 1 to 2 hours) duration of benefit after a given dose of L-dopa".
For stimulation of up to 2 hours duration, medium containing 0% FCS was used.
However, we have shown that greater than 2 hours duration of PMX treatment significantly improved hemodynamics and significantly decreased administration of norepinephrine than 2 hours duration of PMX treatment.
30 Catecholamines play a role in increasing glucose production only during moderate-intensity exercise greater than 2 hours duration.
Similar to previous studies, PMX-DHP is being done in two treatment sessions of 2 hours duration approximately 1 day apart.
The programme consists of 2 sessions of 4 hour duration each and 1 session of 2 hour duration.
Five patients aged 70 (48 72) years underwent uncomplicated operations of > 2 hour duration in combined general and epidural anaesthesia and were extubated in the operating room.
On two occasions during 1917, German zeppelins made flights of almost 100 hours' duration.
Course completion averaged 22 hours duration over a three-week period.
Four (24%) deaths were sudden with either no recognized antecedent illness or illness of less than 6 hours duration.
