Error message

Notice : Undefined offset: 1 dans theme_print_url_list() (ligne 357 dans /var/www/airallergy.sciensano.be/sites/all/modules/print/print.pages.inc).
Notice : Undefined offset: 1 dans theme_print_url_list() (ligne 357 dans /var/www/airallergy.sciensano.be/sites/all/modules/print/print.pages.inc).
Notice : Undefined offset: 1 dans theme_print_url_list() (ligne 357 dans /var/www/airallergy.sciensano.be/sites/all/modules/print/print.pages.inc).
Notice : Undefined offset: 1 dans theme_print_url_list() (ligne 357 dans /var/www/airallergy.sciensano.be/sites/all/modules/print/print.pages.inc).

Hazel (Corylus)	Alder (Alnus)
Yew and Cypress family (Taxus & Cupressaceae)	Willow (Salix)
Poplar (Populus)	Ash (Fraxinus)
Hornbeam (Carpinus)	Birch (Betula)
Plane (Platanus)	Oak (Quercus)
Beech (Fagus)	Pine, spruce and cedar (Pinaceae)
Horse chestnut (Aesculus)	Linden (Tilia)
Sweet chestnut (Castanea sativa)

Sorrels and docks (Rumex)	Plantain (Plantago)
Grasses (Poaceae)	Lamb’s quarter (Amaranthaceae)
Nettle's family (Urticaceae)	Mugwort (Artemisia)

AirAllergy.be
Belgian Aerobiological Surveillance Network