function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aistleitner, E.', 5],
    ['Aistleitner, Eyjolf', 10],
    ['Boisduval, Jean Baptiste Alphonse Dechauffour de', 1],
    ['Bonelli, Simona & Barbero, Francesca & Casacci, Luca Pietro', 9],
    ['Franeta, Filip', 1],
    ['Hinojosa, Joan C. & Tóth, János P. & Monasterio, Yeray', 1],
    ['Khudhur, Farhad A.', 4],
    ['Kolesnichenko, Kirill A. & Kotlobay, Anatoly A.', 8],
    ['Lukhtanov, Vladimir A.', 1],
    ['Makhov, I. A. & Lukhtanov, V. A. & Matov, A. Yu.', 1],
    ['Russell, Peter J. C. & Lukhtanov, Vladimir A.', 4],
    ['Russell, Peter J. C. & Lukhtanov, Vladimir A. & Tennent, W. John', 26],
    ['Russell, Peter J. C. & Tennent, W. John', 1],
    ['Vеrоvnik, Rudi', 2],
    ['Zahiri, Reza & Nazari, Vazrick & Rajaei, Hossein', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=81)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);