This is the 1832nd most frequent Turkish word.
doktorların
"Doktorların" means "of the doctors" or "doctors'."
In this sentence, 'doktorların' indicates possession, referring to the clinic that belongs to the doctors.
Doktorların kliniği erken saatlerde açılıyor.
The doctors' clinic opens early in the morning.
Here, 'doktorların' is used possessively again, showing ownership of the opinions attributed to the doctors.
Doktorların fikirlerini dinledim.
I listened to the doctors' opinions.
'Doktorların' in this case describes the working conditions related to or belonging to the doctors, again showing possession.