function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arens, Werner', 3],
    ['Buys, Sandor Christiano', 1],
    ['Dollfuss, H.', 20],
    ['Fateryga, A. V. & Ivanov, S. P. & Mokrousov, M. V.', 1],
    ['Gadallah, Neveen S.', 1],
    ['H, Phong & G, P. & N, Yuriy', 4],
    ['Jahantigh, Fatemeh & Rakhshani, Ehsan & Mokhtari, Azizollah', 2],
    ['Mokrousov, M. V. & Shorenko, K. I. & Shlyakhtenok, A. S.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);