function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bitner, Maria Aleksandra', 2],
    ['Bitner, Maria Aleksandra & Logan, Alan', 3],
    ['Bitner, Maria Aleksandra & Lozouet, Pierre & Cahuzac, Bruno', 5],
    ['Bitner, Maria Aleksandra & Moissette, Pierre', 2],
    ['Gerovasileiou, Vasilis & Bailly, Nicolas', 8],
    ['Logan, Alan & Bitner, Maria Aleksandra', 1],
    ['Rojas, Alexis & Gracia, Adriana & Patarroyo, Pedro', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);