function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Handal, Adil Y. & Torstensson, Anders & Wulff, Angela', 2],
    ['Cocquyt, Christine & Taylor, Jonathan C.', 2],
    ['Jahn, Regine & Kusber, Wolf-Henning & Cocquyt, Christine', 18],
    ['Long, Ji-Yan & Kociolek, John Patrick & Williams, David M.', 2],
    ['Long, Ji-Yan & Liu, Bing & Rioual, Patrick & Yang, Bin', 4],
    ['Sala, Silvia E. & Guerrero, José M. & Avellaneda, Marcela Núñez', 1],
    ['Solak, Cüneyt Nadir & Cocquyt, Christine & Hamilton, Paul B.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    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);