function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cantalice, Kleyton Magno & Martinez-Melo, Alejandra', 3],
    ['Ebert, Martin & Lane, Jennifer & Koelbl-Ebert, Martina', 2],
    ['Laan, Richard Van Der', 1],
    ['López-Arbarello, Adriana & Bürgin, Toni & Furrer, Heinz', 3],
    ['López-Arbarello, Adriana & Wencker, Lukardis C. M.', 2],
    ['Maxwell, Erin Elysse & López-Arbarello, Adriana', 1],
    ['Schröder, Kerstin & López-Arbarello, Adriana & Ebert, Martin', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    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);