function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bernard, F.', 2],
    ['Bezděčková, Klára & Bezděčka, Pavel & Macek, Ján', 1],
    ['Cedric A. Collingwood & Donat Agosti & Mostafa R. Sharaf', 4],
    ['Collingwood, C. A.', 1],
    ['Collingwood, C. A., Pohl, F., Güsten, R., Wranik, W., van Harten', 1],
    ['DE ALBUQUERQUE, EMÍLIA ZOPPAS & PRADO, LÍVIA PIRES DO', 1],
    ['Espadaler, X.', 2],
    ['LaPolla, John S. & Fisher, Brian L.', 3],
    ['LaPolla, John S. & Hawkes, Peter G. & Fisher, Jonathan N.', 2],
    ['Mohamed, S. & Zalat, S. & Fadl, H.', 2],
    ['Paknia, O. & Radchenko, A. & Alipanah, H.', 3],
    ['Ward, P. S.', 7],
    ['Wild, A. L.', 9],
    ['Wild, Alexander L.', 3],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 4],
    ['Other (13)', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=58)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);