function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cuadrado, Daniel & Rodríguez, Jorge & Moro, Leopoldo', 2],
    ['Dixit, Sudhanshu & Raghunathan, C. & Chandra, Kailash', 1],
    ['Faubel, A. & Warwick, R. M.', 1],
    ['Gammoudi, Mehrez & Garbouj, Myriam & Egger, Bernhard', 1],
    ['Norena, Carolina & Marquina, Daniel & Perez, Jacinto', 3],
    ['Noreña, Carolina', 2],
    ['Soutullo, Patricia & Cuadrado, Daniel & Noreña, Carolina', 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);