function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aguado, M. Teresa & Murray, Anna & Hutchings, Pat', 3],
    ['Aguado, Teresa & Martín, Guillermo San & Ten, Harry A.', 2],
    ['Faulwetter, Sarah & Chatzigeorgiou, Georgios & Galil, Bella S.', 2],
    ['Faulwetter, Sarah & Simboura, Nomiki & Katsiaras, Nikolaos', 4],
    ['Lattig, Patricia & Martin, Daniel', 2],
    ['Linero-Arana, Ildefonso & Diaz Diaz, Oscarn', 2],
    ['Martín, Guillermo San & Hutchings, Pat & Aguado, María Teresa', 7],
    ['Martínez, María José & Martín, Guillermo San', 2],
    ['Mikac, Barbara', 1],
    ['Rodríguez, Yolanda Lucas & Martín, Guillermo San & Fiege, Dieter', 2],
    ['Salcedo, Diana L. & Martín, Guillermo San', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);