Table 1.

Country, background, and experience of participants of the reliability trial.

Background	Country	Experience with…
		Laying hens	Keel bones	Palpation or dissection	Radiographs in general	Keel bone radiographs
Veterinarian	Germany	Yes	Yes	Yes	Yes	Yes
Veterinarian	Egypt	Yes	Yes	Yes	Yes	Yes
Veterinarian	Switzerland	Yes	Yes	Yes	Yes	Yes
Scientist	USA	Yes	Yes	Yes	Yes	Yes
Scientist	Germany	Yes	Yes	Yes	Yes	Yes
Veterinarian	Austria	Yes	Yes	Yes	Yes	No
Technician	Germany	Yes	Yes	Yes	No	Yes
Technician	Germany	Yes	Yes	Yes	No	Yes
Technician	Germany	Yes	Yes	Yes	No	Yes
Scientist	Sweden	Yes	Yes	Yes	No	No
Scientist	Denmark	Yes	Yes	Yes	No	No
Technician	UK	Yes	Yes	Yes	No	No
Student	Switzerland	Yes	Yes	No	No	No
Scientist	Germany	Yes	No	No	Yes	No