function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulnes, V. N. & Faubel, A. & Park, J. - K.', 3],
    ['Gammoudi, Mehrez & Garbouj, Myriam & Egger, Bernhard', 1],
    ['Gammoudi, Mehrez & Tekaya, Saïda & Noreña, Carolina', 2],
    ['Lee, Ka-Man & Beal, A. Michel & Johnston, Emma L.', 1],
    ['Maghsoudlou, Abdolvahab & Momtazi, Farzaneh', 1],
    ['Marquina, Daniel & Osca, David & Rodríguez, Jorge', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=10)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);