function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boldin, Vladislav I. & Nikitin, Yuri G.', 1],
    ['Born, Ignaz von', 1],
    ['Conrad, Timothy Abbot', 1],
    ['Geiger, Daniel L.', 1],
    ['Ivanova, Mariya B. & Tsurpalo, Alexandra P.', 3],
    ['Linnaeus, Carolus', 9],
    ['Lutaenko, K. A. & Artemieva, N. G.', 1],
    ['Müller, Otto Friedrich', 1],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 3],
    ['Sowerby, James DeCarle', 1],
    ['Wolff, Marta & Kosmann, Cecilia', 1],
    ['Zhang, Jun-Long & Xu, Feng-Shan & Liu, Rui-Yu', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);