function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barragán, Yamaly & Sánchez, Carlos & Rodríguez, Estefanía', 1],
    ['Daly, Marymegan & Fautin, Daphne G.', 1],
    ['Gonzalez-Munoz, Ricardo & Simoes, Nuno & Tello-Musi, Jose Luis', 1],
    ['Spano, Carlos & Häussermann, Vreni', 1],
    ['Vassallo-Avalos, Aurora & González-Muñoz, Ricardo', 4],
    ['Yanagi, Kensuke & Daly, Marymegan', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    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);