function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abe, Hirokazu & Sato-Okoshi, Waka', 4],
    ['Delgado-Blas, Victor Hugo & Salazar-Silva, Patricia', 7],
    ['Faulwetter, Sarah & Simboura, Nomiki & Katsiaras, Nikolaos', 12],
    ['Götting, Miriam', 4],
    ['Imajima, Minoru', 6],
    ['Lee, Geon Hyeok & Min, Gi-Sik', 4],
    ['Mikac, Barbara', 1],
    ['Salazar-Vallejo, Sergio I. & Carrera-Parra, Luis F.', 1],
    ['Sikorski, Andrey V. & Pavlova, Ljudmila V.', 1],
    ['Surugiu, Victor', 3],
    ['Tasso, Vicente & El Haddad, Mustapha & Assadi, Carolina', 2],
    ['Williams, Jason D.', 4],
    ['Zhou, Jin', 1],
    ['Zhou, Jin & Ji, Weiwei & Li, Xinzheng', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=57)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);