function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdel-Dayem, Mahmoud S. & Fad, Hassan H. & El-Torkey, Ashraf M.', 2],
    ['Bezděk, Aleš & Hájek, Jiří', 5],
    ['Cheung, Kahong & Bai, Ming & Leung, Manhin & Lee, Yingming', 2],
    ['Deschodt, Christian M. & Davis, Adrian L. V.', 19],
    ['Dupuis, Fabien', 1],
    ['Harrison, J. Du G. & Scholtz, C. H. & Chown, S. L.', 19],
    ['Hielkema, Auke J.', 1],
    ['Krell, Frank-Thorsten & Rey, Antonio & Micó, Estefanía', 2],
    ['Linnaeus, Carolus', 64],
    ['Maldaner, Maria E. & Cupello, Mario & Ferreira, Daniela C.', 3],
    ['Zidek, Jiri & Pokorný, Svatopluk', 43]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=161)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);