function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Kiałka, Agata & Ruta, Rafał', 51],
    ['Klausnitzer, Bernhard', 1],
    ['Litovkin, S. V. & Efimov, D. А.', 6],
    ['Pentinsaari, Mikko & Anderson, Robert & Borowiec, Lech', 3],
    ['Prokin, A. A. & Sazhnev, A. S.', 2],
    ['Ruta, Rafał', 5],
    ['Ruta, Rafał & Libonatti, María Laura', 1],
    ['Yoshitomi, Hiroyuki Dr.', 8],
    ['Zwick, Peter', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=80)',
    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);