function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bálint, Zsolt & Boyer, Pierre & Farfán, Jackie & Cerdeña, José', 2],
    ['Bálint, Zsolt & Vértesy, Zofia & Biró, László P.', 3],
    ['Hall, Jason P. W. & Willmott, Keith R. & Busby, Robert C.', 5],
    ['Prieto, Carlos', 1],
    ['Prieto, Carlos & Bálint, Zsolt & Boyer, Pierre & Micó, Estefanía', 9],
    ['Prieto, Carlos & Rodriguez, Gabriel', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    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);