function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cambefort, Yves & Bordat, Patrice', 1],
    ['Edmonds, W. D.', 1],
    ['Génier, François & Moretto, Philippe', 29],
    ['Hielkema, Auke J. & Hielkema, Meindert A.', 2],
    ['Ivie, Michael A. & Philips, Keith', 1],
    ['Taboada-Verona, Carlos & Sermeño-Correa, Carlos', 1],
    ['Ziani, Stefano & Abdel-Dayem, Mahmoud Saleh', 1],
    ['Ziani, Stefano & Bezděk, Aleš & Branco, Tristão', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=37)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);