function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Capa, Maria & Parapar, Julio & Hutchings, Pat', 1],
    ['Díaz-Díaz, Oscar Felipe & Parapar, Julio & Moreira, Juan', 1],
    ['Faulwetter, Sarah & Simboura, Nomiki & Katsiaras, Nikolaos', 2],
    ['Mikac, Barbara', 1],
    ['Parapar, Julio & Moreira, Juan', 3],
    ['Tasso, Vicente & El Haddad, Mustapha & Assadi, Carolina', 1],
    ['Yanez-Rivera, Beatriz & Tovar-Hernandez, Maria Ana', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=10)',
    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);