function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Campos-Moreno, Diego F. & Gates, Michael W. & Zhang, Y. Miles', 1],
    ['Dale-Skey, Natalie & Askew, Richard R. & Noyes, John S.', 4],
    ['Delvare, G. & Escolà, A. Ribes & Stojanova, A. M. & Benoit, L.', 3],
    ['Gates, M. W. & Metz, M. A. & Schauff, M. E.', 9],
    ['Gates, Michael', 1],
    ['Gates, Michael W.', 1],
    ['Lotfalizadeh, Hossein & Karimpour, Younes & Delvare, Gérard', 1],
    ['Lotfalizadeh, Hosseinali & Delvare, Gérard & Rasplus, Jean-Yves', 1],
    ['Madl, Michael', 1],
    ['Pérez-Benavides, A. Lucía & Hernández-Baz, Fernando', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);