function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['BEUKEMA, WOUTER & DE POUS, PHILIP & DONAIRE-BARROSO, DAVID', 1],
    ['Dufresnes, Christophe & Strachinis, Ilias & Tzoras, Elias', 8],
    ['Rage, Jean-Claude', 1],
    ['Sahni, Ashok', 1],
    ['Syromyatnikova, Elena & Tesakov, Alexey & Mayda, Serdar', 1],
    ['Vasilyan, Davit & Cernansky, Andrej & Szyndlar, Zbigniew', 1],
    ['Venczel, Márton & Stiuc, Emanoil', 1],
    ['Villa, Andrea & Macaluso, Loredana & Mörs, Thomas', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);