difficult-to-treat patients
difficult intubation
difficult issue
difficult issues
difficult laryngoscopy
difficult management problem
difficult patients
difficult position
difficult problem
difficult process
difficult question
difficult relationships
difficult situation
difficult task
difficult temperament

difficult times
difficult tracheal intubation
difficulties
difficulties inherent
difficulty score
difficulty walking
diffracted intensity
diffracting crystals
diffraction
diffraction-quality crystals
diffraction analysis
diffraction analysis shows
diffraction angles
diffraction characteristics
diffraction data
diffraction data analysis

diffraction data collection
diffraction data set
diffraction data show
diffraction effects
diffraction efficiency
diffraction experiments
diffraction geometry
diffraction gratings
diffraction images
diffraction imaging
diffraction intensities
diffraction investigations
diffraction limit
diffraction line profiles
diffraction measurements
diffraction method

diffraction methods
diffraction patterns
diffraction peaks
diffraction profiles
diffraction properties
diffraction quality
diffraction results
diffraction reveals
diffraction shows
diffraction signal
diffraction spectra
diffraction spectroscopy
diffraction spots
diffraction structure
diffraction studies
diffraction study

diffraction technique
diffraction techniques
diffraction theory
diffractometer
diffractometry
diffuse
diffuse alveolar damage
diffuse Lewy body disease
diffuse X-ray emission