function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Albert, Eva M. & Fernández, Adrián', 2],
    ['Bailon, Salvador', 1],
    ['Bolet, Arnau & Delfino, Massimo & Fortuny, Josep', 1],
    ['Ceríaco, Luis M. P. & Bauer, Aaron M.', 1],
    ['García-Díez, Teresa & González-Fernández, José E.', 1],
    ['Sindaco, Roberto & Kornilios, Panagiotis & Sacchi, Roberto', 4],
    ['Venczel, Márton & Stiuc, Emanoil', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);