function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cepeda, Diego & Sánchez, Nuria & Sørensen, Martin V.', 2],
    ['González-Casarrubios, Alberto & Arbizu, Pedro Martínez', 3],
    ['González-Casarrubios, Alberto & Cepeda, Diego & Neuhaus, Birger', 2],
    ['González-Casarrubios, Alberto & Cepeda, Diego & Pardos, Fernando', 1],
    ['González-Casarrubios, Alberto & Pardos, Fernando', 2],
    ['Neuhaus, Birger & Lu, Borong & Yamasaki, Hiroshi', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    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);