function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['A. M', 1],
    ['Broad, Gavin R.', 30],
    ['Di Giovanni, Filippo & Reshchikov, Alexey & Riedel, Matthias', 2],
    ['Ghahari, H. & Hayat, R. & Tabari, M. & Ostovan, H. & Imani, S.', 1],
    ['Kolarov, J.', 6],
    ['Riedel & Pénigot & Schwarz & Diller & Johansson & Japoshvili, G.', 12],
    ['Riedel, Matthias', 5],
    ['Riedel, Matthias & Diller, Erich & Japoshvili, George', 2],
    ['Varga, Oleksandr & Riedel, Matthias & Diller, Erich', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=70)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);