Table 1. Details of the considered allergenic pollens.

No.	General name	Genus name	Type	Allergenicity
1	Alder	Alnus	Tree	High
2	Japanese cedar	Cupressaceae*	Tree	High
3	Birch	Betula	Tree	High
4	Hazelnut	Corylus	Tree	High
5	Oak	Quercus	Tree	High
6	Elm	Ulmaceae*	Tree	Medium
7	Pine	Pinaceae*	Tree	Low
8	Ginkgo	Ginkgo	Tree	Low
9	Chestnut	Castanea	Tree	Low
10	Grasses	Poaceae*	Grass	High
11	Ragweed	Ambrosia	Weed	High
12	Mugwort	Artemisia	Weed	High
13	Japanese hop	Humulus	Weed	High

^*Indicates family name. Note that family names have been presented instead of genus for Japanese cedar, elm, pine, and grasses owing to difficulties in identifying the specific genus of collected pollen.