Correspondence: Carmen Maria da Costa Botelho, Serviço de Imunoalergologia, Hospital de São João, Alameda Professor Hernâni Monteiro, 4200 Porto, Portugal.
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| Year/Month | Html | Total | |
|---|---|---|---|
| 2025 12 | 173 | 13 | 186 |
| 2025 11 | 512 | 55 | 567 |
| 2025 10 | 386 | 30 | 416 |
| 2025 9 | 306 | 21 | 327 |
| 2025 8 | 372 | 33 | 405 |
| 2025 7 | 338 | 17 | 355 |
| 2025 6 | 324 | 5 | 329 |
| 2025 5 | 348 | 13 | 361 |
| 2025 4 | 390 | 11 | 401 |
| 2025 3 | 314 | 12 | 326 |
| 2025 2 | 307 | 9 | 316 |
| 2025 1 | 276 | 8 | 284 |
| 2024 12 | 280 | 5 | 285 |
| 2024 11 | 211 | 12 | 223 |
| 2024 10 | 188 | 5 | 193 |
| 2024 9 | 210 | 5 | 215 |
| 2024 8 | 181 | 8 | 189 |
| 2024 7 | 214 | 9 | 223 |
| 2024 6 | 233 | 15 | 248 |
| 2024 5 | 296 | 8 | 304 |
| 2024 4 | 274 | 3 | 277 |
| 2024 3 | 243 | 16 | 259 |
| 2024 2 | 201 | 10 | 211 |
| 2024 1 | 214 | 14 | 228 |
| 2023 12 | 198 | 17 | 215 |
| 2023 11 | 240 | 11 | 251 |
| 2023 10 | 225 | 17 | 242 |
| 2023 9 | 151 | 10 | 161 |
| 2023 8 | 136 | 11 | 147 |
| 2023 7 | 156 | 5 | 161 |
| 2023 6 | 135 | 13 | 148 |
| 2023 5 | 154 | 8 | 162 |
| 2023 4 | 150 | 2 | 152 |
| 2023 3 | 203 | 8 | 211 |
| 2023 2 | 96 | 9 | 105 |
| 2023 1 | 92 | 6 | 98 |
| 2022 12 | 63 | 10 | 73 |
| 2022 11 | 95 | 7 | 102 |
| 2022 10 | 71 | 8 | 79 |
| 2022 9 | 74 | 10 | 84 |
| 2022 8 | 84 | 27 | 111 |
| 2022 7 | 51 | 9 | 60 |
| 2022 6 | 38 | 10 | 48 |
| 2022 5 | 42 | 11 | 53 |
| 2022 4 | 43 | 25 | 68 |
| 2022 3 | 51 | 14 | 65 |
| 2022 2 | 51 | 9 | 60 |
| 2022 1 | 55 | 13 | 68 |
| 2021 12 | 57 | 10 | 67 |
| 2021 11 | 40 | 21 | 61 |
| 2021 10 | 45 | 11 | 56 |
| 2021 9 | 40 | 6 | 46 |
| 2021 8 | 34 | 9 | 43 |
| 2021 7 | 73 | 6 | 79 |
| 2021 6 | 93 | 5 | 98 |
| 2021 5 | 86 | 10 | 96 |
| 2021 4 | 76 | 16 | 92 |
| 2021 3 | 32 | 9 | 41 |
| 2021 2 | 8 | 6 | 14 |
| 2021 1 | 14 | 8 | 22 |
| 2020 12 | 1 | 2 | 3 |
| 2018 2 | 2 | 7 | 9 |
| 2018 1 | 9 | 8 | 17 |
| 2017 12 | 4 | 5 | 9 |
| 2017 11 | 7 | 5 | 12 |
| 2017 10 | 5 | 4 | 9 |
| 2017 9 | 10 | 8 | 18 |
| 2017 8 | 5 | 7 | 12 |
| 2017 7 | 8 | 12 | 20 |
| 2017 6 | 10 | 8 | 18 |
| 2017 5 | 17 | 14 | 31 |
| 2017 4 | 13 | 7 | 20 |
| 2017 3 | 11 | 38 | 49 |
| 2017 2 | 13 | 0 | 13 |
| 2017 1 | 19 | 4 | 23 |
| 2016 12 | 24 | 4 | 28 |
| 2016 11 | 25 | 3 | 28 |
| 2016 10 | 38 | 11 | 49 |
| 2016 9 | 16 | 10 | 26 |
| 2016 8 | 10 | 8 | 18 |
| 2016 7 | 13 | 1 | 14 |
| 2016 6 | 11 | 10 | 21 |
| 2016 5 | 10 | 6 | 16 |
| 2016 4 | 23 | 10 | 33 |
| 2016 3 | 21 | 10 | 31 |
| 2016 2 | 27 | 26 | 53 |
| 2016 1 | 22 | 7 | 29 |
| 2015 12 | 12 | 10 | 22 |
| 2015 11 | 21 | 4 | 25 |
| 2015 10 | 22 | 7 | 29 |
| 2015 9 | 21 | 3 | 24 |
| 2015 8 | 10 | 4 | 14 |
| 2015 7 | 5 | 3 | 8 |
| 2015 6 | 1 | 4 | 5 |
| 2015 5 | 3 | 1 | 4 |
| 2015 4 | 10 | 6 | 16 |
| 2015 3 | 6 | 4 | 10 |
| 2015 2 | 2 | 4 | 6 |
| 2015 1 | 16 | 3 | 19 |
| 2014 12 | 22 | 8 | 30 |
| 2014 11 | 15 | 3 | 18 |
| 2014 10 | 23 | 6 | 29 |
| 2014 9 | 21 | 2 | 23 |
| 2014 8 | 6 | 1 | 7 |
| 2014 7 | 3 | 1 | 4 |
| 2014 6 | 5 | 1 | 6 |
| 2014 5 | 3 | 1 | 4 |
| 2014 4 | 1 | 1 | 2 |
| 2014 3 | 42 | 9 | 51 |
| 2014 2 | 36 | 3 | 39 |
| 2014 1 | 39 | 6 | 45 |
| 2013 12 | 41 | 9 | 50 |
| 2013 11 | 27 | 5 | 32 |
| 2013 10 | 39 | 8 | 47 |
| 2013 9 | 29 | 7 | 36 |
| 2013 8 | 30 | 4 | 34 |
| 2013 7 | 36 | 10 | 46 |
| 2013 6 | 19 | 9 | 28 |
| 2013 5 | 26 | 11 | 37 |
| 2013 4 | 18 | 12 | 30 |
| 2013 3 | 23 | 7 | 30 |
| 2013 2 | 4 | 3 | 7 |
| 2013 1 | 3 | 1 | 4 |
| 2012 10 | 2 | 1 | 3 |
| 2008 8 | 973 | 0 | 973 |


