function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahad, Sumaya & Ahmad, Wasim', 9],
    ['Ahmad, Wasim', 2],
    ['Ahmad, Wasim & Park, Byeong-Yong & Lee, Jae-Kook & Choi, Dong-Ro', 4],
    ['Edm. Altherr, Aigle', 3],
    ['Edmond Altherr', 1],
    ['Edmond Altherr & Delamare Deboutteville, C.', 2],
    ['Golhasan, Behrouz & Heydari, Ramin & Peña-Santiago, Reyes', 1],
    ['H. Jabbari & Gh. Niknam & A. Fallahi & E. Zahedi Asl & M. Nikdel', 1],
    ['Holovachov, Oleksandr', 10],
    ['Islam, Md Niraul & Ahmad, Wasim', 10],
    ['Khudhir, Manda & Hodda, Mike & Nicholas, Evelyn', 1],
    ['Li, Yujuan & Baniyamuddin, M. & Ahmad, Wasim & Wu, Jihua', 4],
    ['P. A. A. LOOF', 2],
    ['Rossen, H. v. & Loof, P. A. A.', 1],
    ['Árpád, Soós', 2],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=56)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);