function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barrio-Amorós, César L. & Brewer-Carías, Charles', 1],
    ['Brown, Jason L. & Schulte, Rainer & Summers, Kyle', 1],
    ['Fouquet, Antoine & Vidal, Nicolas & Dewynter, Maël', 1],
    ['Miracle, Eulàlia Gassó & Van, Lars W. & Ostende, Den Hoek', 1],
    ['Ovalle-Pacheco, Andrés & Camacho-Rozo, Claudia & Arroyo, Sandy', 1],
    ['Rueda-Almonacid, José Vicente & Rada, Marco', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=7)',
    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);